LOW TSH - LOW THYREOTROPIN SYMPTOMS and CAUSES


The TSH is a hormone produced by the pituitary gland, it can also be called thyrotropin, thyrotropic hormone or thyroid stimulating hormone. The analysis of TSH values allows us to understand how the gland is working thyroid. A Low TSH it is often linked to increased thyroid hormone levels with symptoms of hyperthyroidism.

The TSH is the main regulator of two thyroid hormones: the T4 (thyroxine) and T3 (triiodothyronine). Thyroid hormones are essential substances for the proper functioning of the body, and are synthesized from a precursor called thyroglobulin.

In the blood tests the part of the thyroid hormones not bound to proteins, ie the "free" part of the thyroid hormones. These hormones are often referred to as fT3 and fT4, where "f" means "free".

Low TSH

Given that each laboratory has its own reference ranges, we speak of Low TSH when its concentration measured by a peripheral blood sample turns out to be less than 0.5 mIU / L.

TSH: when to take the exam

Thyrotropin (TSH) is measured to evaluate thyroid function and identify any alterations both in the sense of thyroid hyperactivity (hyperthyroidism), and in case of hypofunction (hypothyroidism); measuring TSH also serves to monitor the effectiveness of therapeutic treatment in case of hypothyroidism (monitoring of thyroid hormone replacement therapy) or hyperthyroidism (monitoring of thyroid suppressive therapy).

Sometimes in the doctor's prescriptions or in blood tests we find the wording TSH reflex or TSH reflex: this is not a different type of TSH, but the name of a protocol that aims to optimize medical expenses by first performing only the TSH dosage and then, if this is altered, continues with the dosage, on the same tube of blood, of the thyroid hormones. Hence TSH reflex and TSH both indicate thyrotropin hormone.

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Low TSH causes

What does it mean have a low TSH? What does it mean when do we find low values of thyrotropin? The values of the TSH are related tohypothalamus pituitary thyroid axis, an efficient self-regulating system of thyroid function. Thanks to this axis, the hormones fT3 and fT4 are kept in the normal range by the TSH secreted at the pituitary level, which in turn is regulated at the hypothalamic level by the secretion of TRH (thyrotropin releasing hormone). Very often, the finding of low TSH is consequent to a hyperfunction of the thyroid gland, and therefore to the presence of high values of fT3 and fT4. According to the hypothalamic-pituitary-thyroid regulation, in fact, the TSH secretion is regulated by the concentration of thyrotropin-releasing hormone, or TRH (its increase causes TSH production and secretion) and from the blood levels of fT3 and fT4 (when they increase, TSH secretion is reduced).

Thyroid and low TSH

Low TSH - The thyroid, a butterfly-shaped gland located in the neck straddling the trachea. In case of thyroid hyperfunction with excess thyroid hormones, the TSH values can be reduced.

If there is therefore an overproduction of thyroid hormones, the pituitary gland tries to remedy it by decreasing the production of TSH, so that the thyroid is less stimulated to produce fT3 and fT4, returning to normal hormonal values. Initially this mechanism may be sufficient to compensate for the imbalance, but very often the continuous production of excess thyroid hormones leads to a TSH at almost indosable values and fT3 and fT4 constantly above the normal levels. This situation is called hyperthyroidism.

Why our TSH goes down? Below are the Common causes of low TSH:

Basedow-Graves disease: Graves' disease, also called diffuse toxic goiter, is an autoimmune disease caused by the presence of antibodies directed against the TSH receptor. In the long run, this can cause thyroid goiter formation with hormonal overproduction, and at the diagnostic level it will be characterized by hyperthyroidism with Low TSH, thyroxine and high triiodothyronine, and presence of TSH receptor antibodies.

Toxic nodular goiter: it is a benign neoplasm of the thyroid gland, characterized by a nodule (uninodular goiter or toxic thyroid adenoma, also called Plummer's disease) or several nodules (multi nodular goiter) that "work too much", producing large quantities of thyroid hormones . At the level of the blood analysis we will therefore have high fT3 and fT4 and low TSH.

Thyroiditis: it is an inflammatory process at the thyroid level, which can be of an infectious nature (such as acute or sub-acute thyroiditis) or autoimmune (such as chronic thyroiditis). In autoimmune thyroiditis there is a frequent finding of antibodies to thyroperoxidase and antibodies to thyroglobulin, and are characterized by Low TSH and high values of fT3 and fT4. The most frequent forms are Hashimoto's thyroiditis, postpartum thyroiditis and silent lymphocytic thyroiditis. In non-autoimmune thyroiditis (e.g. acute bacterial thyroiditis or De Quervain's subacute thyroiditis), anti-thyroid antibodies are found much less frequently.

Too high doses of hormone replacement therapy or other drug therapy: in patients already taking thyroid replacement therapy (i.e. taking thyroxine, the most commonly used trade name is Eutirox), a Low TSH with high thyroid hormones they may be the consequence of too high a dose of the drug. Even patients on lithium therapy for psychoactive therapy, or with amiodarone, for the control of cardiac arrhythmias, may have a hormonal imbalance in the hyperthyroid sense. In the case of amiodarone, high levels of free thyroxine are often found, with normal or low fT3. In this case we speak of low T3 syndrome, or a conversion defect from T4 to T3. Find out more about it Low TSH and Eutirox.

Ovarian teratoma: it is a neoplasm composed of embryonic tissues and therefore potentially also of thyroid type tissue, with ovarian localization. This tumor can also be benign, and causes hyperthyroidism for production not thyroid of T3 and T4, resulting in TSH reduction.

Familial non-autoimmune hyperthyroidism: this disorder is linked to the mutation of a gene that codes for the TSH receptor, and is transmitted in an inherited manner. The thyroid then escapes the pituitary hormone control, and begins to produce thyroid hormones in an uncontrolled way. As a result, the pituitary will decrease TSH production to attempt to limit the elevated levels of fT3 and fT4. We'll have blood tests then high thyroid hormones and low TSH.

Pregnancy: in the first three months of pregnancy, due to the increased levels of human chorionic gonadotropin (HCG), there is hyperstimulation of the thyroid gland, which results in a moderate increase in T3 and T4 and a slight decrease in TSH.

Hyperemesis gravidarum: it is a disorder that occurs during pregnancy, characterized by repeated vomiting episodes, which leads to even serious imbalances, often linked to unfavorable psychological conditions. In this situation, the increase in chorionic gonadotropin (HCG) stimulates the thorium to produce thyroid hormones. As a result, the pituitary gland will secrete lower levels of TSH. The biohumoral analyzes will therefore take place Low TSH and high fT3 and fT4.

Choriocarcinoma: it is a tumor of the trophoblast, which arises from the villi of the placenta. This rare form of neoplasm causes an increase in the concentration of chorionic gonadotropin (HCG) which, as in hyperemesis gravidarum, causes thyroid hyperstimulation with increased T3 and T4 and low TSH levels.

Subclinical hyperthyroidism: in the initial phase, hyperthyroidism occurs only with low thyrotropin values which they accompany normal levels of T3 and T4.

Dysfunctions of the pituitary gland: if the pituitary, despite good thyroid function, does not produce adequate levels of thyrotropin (TSH), the production of fT3 and fT4 will be negatively affected. In this case we speak of secondary hypothyroidism, characterized by low levels of TSH, fT3 and fT4 .

Dysfunction of the hypothalamus: it can rarely happen that the hypothalamus does not function properly, not producing adequate levels of TRH. Consequently, the pituitary is not adequately stimulated to produce the right amount of TSH. Again we will have Low TRH, low TSH and low fT3 and fT4.

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Low TSH symptoms

Low TSH, if not accompanied by elevated thyroid hormone values (therefore a condition of subclinical hyperthyroidism), often does not involve particular symptoms. If, on the other hand, there are high values of fT3 and fT4, it will manifest itself with the typical symptoms of hyperthyroidism, and therefore:

  • Nervousness
  • Easy Irritability
  • State of anxiety
  • Presence of palpitations (presence of extrasystoles or ectopic beats, up to real arrhythmias)
  • Tachycardia
  • Tremor in the limbs
  • Alopecia
  • Changes in the menstrual cycle
  • Diarrhea
  • Exophthalmos (eye protruding)
  • Possible presence of eyelid swelling
  • Hyperhidrosis (profuse sweating)
  • Thinness and weight loss
  • itch
  • Hot flashes

In the less frequent case of low TSH levels associated with reduced fT3 and fT4, we may have the classic symptoms hypothyroidism, and therefore:

  • Instability of mood
  • Depression
  • Less tolerance to cold
  • Weight gain
  • Fatigue
  • Fragility of skin and nails
  • Loss of eyebrows (especially the outer part)
  • Constipation (constipation)
  • Irregularity of the menstrual cycle,
  • Increased blood levels of cholesterol
  • Memory loss.

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Low TSH in pregnancy

The finding of a Low TSH in pregnancy is often physiological: theTBG (Thyroxin Binding Globulin or thyroxine binding protein), which is none other than the transporter protein of thyroid hormones in the blood, due to the increased circulating levels of estrogen, in turn increases its plasma concentrations. The increased levels of circulating T3 and T4 exert a mild suppressive effect on TSH.

At the same time, the chorionic gonadotropin (hCG or human Chorionic Gonadotropin) produced by the placenta has an inhibiting effect on TSH production. This happens because hCG has a molecular structure that resembles that of the thyroid stimulating hormone and therefore acts on the thyroid TSH receptors activating the production of thyroid hormones, which in turn inhibit the release of TSH at the pituitary level. Here are the two reasons why physiologically is found Low TSH in pregnancy.

Having adequate levels of thyroid hormones circulating during gestation is important to ensure proper neurological and somatic development of the fetus. For this reason the thyrotropic hormone should be checked periodically, and the finding of Low TSH during pregnancy it must always be deepened with further analysis.

In fact, a percentage ranging from 0.1 to 3% of pregnancies may be subject, during the course, to the appearance of gestational hyperthyroidism, often associated with hyperemesis gravidarum. The other most frequent causes of hyperthyroidism in pregnancy I am the Graves' disease and toxic uninodular or multinodular goiter.

L'hyperthyroidism in pregnancy increases the risk of perinatal death, the risk of preterm birth or even miscarriage, the development of hypertension in pregnancy, and a low birth weight of the baby. It is also dangerous for the mother as it increases the incidence of maternal heart failure. For this reason hyperthyroidism during pregnancy should always be investigated to distinguish the cause and start the most appropriate therapy, checking the TSH every 2-4 weeks at the start of therapy, every 4-6 weeks after reaching the target value.

How the exam is carried out

The examination is carried out starting from a blood sample obtained with a venous sampling. It is not necessary to fast before the exam. As some medications can interfere with TSH measurement, you should warn your doctor about all ongoing drug therapy.

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Factors affecting the measurement

Daily changes in blood TSH levels: the highest levels are found around 10 pm, while basal levels are measurable at 10 am.

Many drug therapies they can alter the TSH measurement. The following are the drugs that most commonly can lower TSH levels on blood tests:

    • tricyclic antidepressants
    • aspirin
    • dobutamine and dopamine
    • levodopa
    • apomorphine
    • bexarotene
    • glucocorticoids
    • phenytoin
    • testosterone

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Low TSH what to do

What happens in case of low TSH? What needs to be done?

First, the TSH must be considered together with the analysis of thyroid hormones and, if altered, of the antibodies anti-thyroperoxidase and thyroglobulin, in addition to the anti TSH receptor ab. Furthermore, thoroughness is essential anamnesis (i.e. the patient's history from childhood and evaluating nutrition, habits and present or previous diseases). A physical examination comprehensive to evaluate signs and symptoms and detect any warning lights of thyroid problems. All this can be done both from the general practitioner, as from one endocrinologist specialist.

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89 Comments
  1. Samdra 2 years ago

    Tsh 0.26 t3 3.71 t41.02

  2. Sonia 3 years ago

    Total thyroidectomy surgery are being treated with Eutirox 100 + half of 25, from the latest tests it results ft3 3.6 ft4 9.2 and TSH 0.017 thanks

    • Author
      Testlevels 3 years ago

      He did not report the units of measurement. However, thyroid hormones appear to be normal. Always show everything to your doctor or endocrinologist

  3. luciano 3 years ago

    Hello,
    I just picked up my blood tests, and found an asterisk on TSH 0.01 with FT4 12.5 and FT3 3.5.
    I am 68 years old I have been practicing running for many years, I would like to know if I have to deepen these exams and if they can create problems for the sport I practice
    I hope for your reply and thank you in advance. Sincerely

    • Author
      Testlevels 3 years ago

      Hi, you may suffer from hyperthyroidism (however, the units of measurement for thyroid hormones are missing). Contact an endocrinologist specialist. Best regards

  4. GIOVANNA 4 years ago

    Dear Doctor I am 50 years old and the values from the exams carried out are
    tsh 0.01
    ft3 5.90
    ft4 2.42
    contacts - THANK YOU

    [email protected]

    • Author
      Testlevels 4 years ago

      In-depth studies, anti-thyroid antibodies and thyroid ultrasound are required, as well as an endocrinological visit. Best regards

  5. elena felea 4 years ago

    Good morning. I have had hypothyroidism since I was six. In December 2016 I had a son who is exclusively breastfeeding. After the tests were repeated in January, the tsh was suppressed so the doctor lowered my eutirox dosage. I repeated the exams two more times, always with suppressed values. Each time the doctor has lowered the dosages. The last tests made were on March 18. With tsh 0.009 and t4 17.07. I was taking eutirox 75 mg every day. And now he's got me back on eutirox 50mg every day. I am taking thirodium on medical order 100 mcg everyday. I doubted when reading on the internet that tsh is not suppressed due to an excess of iodine. In my first pregnancy I had another endocrinologist who didn't prescribe thirodium for me. And I've never had any problems with the tsh. And even in the first one I breastfeed. Do you think excess iodine could affect you? Could this suppressed tsh thing affect breastfeeding?

  6. LUCIANA 5 years ago

    Good evening
    Thank you very much for your reply, on Monday I hope to have the possibility of an endocrinological visit. I have no obvious problems ...
    I apologize for the mistake in sending my doubled questions
    Thanks again

    LUCIANA

  7. LUCIANA 5 years ago

    I don't know if the tsh reflex 0.000 and the free t4 2.94 have already been sent

  8. LUCIANA 5 years ago

    Buomgiormo I did the blood tests and the result was tsh reflex 0.000 free T4 2.94 other values in bold are mcv 79.8 mch 25.8 rdw sd 38.4 The general practitioner quickly asked me for an endocrinological examination which
    however, being in a holiday period, I will not be able to do it before 576 days. I am 33 years old and until now I had never had anything
    Thanks if you can answer me
    Luciana

    • Testlevels 5 years ago

      Hi, TSH is completely suppressed while free thyroxine is increased .. this is a picture of hyperthyroidism to be investigated as soon as possible. in any case, an endocrinological visit within one week is reasonable, if you have no particular symptoms or the clinical picture does not change. I would also suggest measuring antibodies to thyroglobulin, anti thyroperoxidase, and anti TSH receptors, as well as booking an ultrasound of the thyroid. Best regards

  9. LUCIANA 5 years ago

    Hello, I did the blood tests and it was tsh reflex 0.000, freee t4 2.94 I'm 33 years old
    My GP immediately requested me for an endocrinological visit which unfortunately I cannot get up to in at least 5 days, given the holiday period. I am worried is this value a serious index?
    OTHER VALUES A BOLD MCV 79.8 MCH 25.8 RDW SD 38.4 BASAL GLUCOSE 107 ALANINE AMINOT ALT 56
    GAMMAGLUTAMILTRANSPEPTIDASE 49
    THANK YOU IF YOU CAN ANSWER ME
    LUCIANA

  10. Luigi Cuccu 5 years ago

    Hello an 87 year old diabetic patient received this diagnosis

    INSTRUMENTAL EXAMINATION: THYROID ULTRASOUND (19/05/2016): ABSENCE OF THE THYROID IN THE ABSENCE OF IMAGES TO REFER TO INJURIES OCCUPATING SPACE OF THE RELEVANT TYPE. TRACHEA IN AXIS. NOT LATEROCERVICAL LYMPHADENOPATHIES.
    DIAGNOSIS: POST SURGICAL HYPOTHYROIDISM POR Ca PAPILLARE (TOTAL TX IN 2005) IN SUBSTITUTE THERAPY AT INADEQUATE DOSAGE, DESPITE THE THERAPY HAS BEEN REDUCED, THE VALUE OF TSH IS ALWAYS INAPPROPRIATELY REDUCED. EXAMS OF 12/12/2016
    TSH 0.06; FT3 2.62; FT4 1.32; AbTG <20 (<60);
    IN ORDER TO EXCLUDE HYPOPITUITARISM, WE RECOMMEND WITHDRAWAL FOR ACTH; FSL, LH, CORTISOL
    TSH, FT3, FT4, HTG, AbTG DOSAGE IS RECOMMENDED
    CARE PLAN
    REDUCES THERAPY ACCORDING TO SCHEME:
    EUTIROX 125 mcg 1 CP DIE MON TO GIOV
    EUTIROX 100 mcg 1 CP FROM FRI TO SUN

    I would like to know if with these values physical activity (with physical activity I mean walking) is helpful or harmful? Because despite being 87 she is a very active woman even at home. Thanks in advance

    • Testlevels 5 years ago

      Moderate physical activity without overexertion can help for many reasons, obviously given the age it is always better that it is supervised by someone and that the doctor, who knows the patient's complete medical history, has given the green light. Best regards

  11. Emanuele Fadda 5 years ago

    Hi or just withdrawn the tests for diabetology and there should be those for the thyroid I assume are the first
    Tsh 1.317 (0.550-4.780)
    Abtg <15.8. (0.00-60.00)
    Abtpo <28.8 (0.00-60.00)
    21OH ab. <1. (0.00-1.00)
    I state that the first exam !!! How am I ??

    • Testlevels 5 years ago

      Interpreting the fourth test reported as TSH receptor antibodies, I would say normal TSH and negative thyroid antibodies. So everything in the norm. Always show the tests to your doctor, best regards.

  12. Gaia 5 years ago

    Good morning
    I have a curiosity to ask.
    I have been using eutirox 100 and 70 every other day for years for hashimoto hypothyroidism. To the latest analyzes
    which were normal (TSH 1.22), he prescribed me eutirox 75 for convenience and re-analyzes afterwards
    a month. The subsequent analysis of 11/15/2016 found a TSH 11.90 simply because mi
    I forgot not to take the pill before the tests. (however, the doctor wants to redo the analyzes).
    The question is this: I thought they were slow-release drugs and didn't produce spikes like that
    high hormone levels. Is this type of action of the drug normal? Doesn't it hurt to have such high blood spikes?
    Thanks
    cordial greetings

    • Testlevels 5 years ago

      It is not an understandable result, it is better to repeat the sample and reason with a more reliable value. Always refer to the advice of the doctor who follows you. Best regards.

      • Silvana 3 years ago

        Hi I did thyroid tests and the results are 2.48 ft3
        Ft4 0.98
        TSH 0.80
        Do I need to do further checks?
        Thanks

        • Author
          Testlevels 3 years ago

          There are no units of measurement, but if they are international, they are within the normal limits. We have to see why she did these tests, in principle I would say that no further tests are needed

  13. TINA GIORDANO 5 years ago

    I was operated on for carcinoma in 2007 and every 3 months, I undergo tests, as the dosage is never the same. I don't remember how TSH must be in someone who does not have an organ. Recently, I have TSH 0.015 ATG 7.2 FT4 1.32 TG 0.2 FERRITIN 10 RED GLOBULES 4.90 WHITE GLOBULES 5.65 HEMOGLOBIN 13.00 HEMATOCRIT 39.60 AVERAGE GLOBULAR VALUE 80.80 MCH 26'50 MCHC 32 '80 RDW 17.00 PLATES 201. HOW THE TESTS ARE, assuming that I feel tired, with insomnia and tachycardia. Thank you.

    • Testlevels 5 years ago

      Hi, free thyroxine is normal even if TSH is low. Probably the treating doctor intends to keep TSH as suppressed as possible. The symptoms you describe should not be related to TIrosint therapy, in any case always refer to your doctor, who will advise you on any therapeutic changes. Best regards

  14. TINA GIORDANO 5 years ago

    In 2007 I underwent thyroid surgery, for a carcinoma, since then I have never had the same dosage. I take exams every 3 months. I state, that I take 31 drops of Tirosint, currently, the tests show an ATG 7.2 TSH 0.015 FT4 1.32 TG 0.2 FERRITIN 10 HEMOGLOBIN 13.00 RED GLOBULES4.90 WHITE GLOBULES 5.65 I FEEL VERY TIRED, WITH HEADACHE AND INSOMNIA. WHAT ARE THE EXAMS? THANKS

  15. Anna Maria 5 years ago

    Hi, I'm 47 years old and in 2008 I underwent metabolic radiametotherapy for graves' disease For the first four years I always took the same dosage and more or less the values were normal. In May I discover I have a tsh 0.05 with normal f3 and f4 so from 75 that I took every day I went to two days a week at 50 through the advice of the specialist. After two months (July) the tsh was 0.15 and after another two months (September) 0, 20. I take the exams now and I find myself again a tsh at 0.09 with f3 and f4 normal. What happened? Given that as soon as I wake up in the morning in the last month I have intensified the morning run. Thanks

  16. Chiara 5 years ago

    good evening doctor
    I did the thyroid tests 6 months ago the values are these
    THS 0.97 (0.27-4.70)
    FT4 17.41 (9-20)
    FT3 4.74 (4-8.30)
    I got pregnant in September of this year and no one asked me to check my thyroid again, neither the general practitioner nor the gynecologist would like to know if those values are within the range or is there any abnormality?
    Thanks

    • Testlevels 5 years ago

      Hi, TSH and thyroid hormone values were fine. Eventually he can carry out a second check in case of familiarity with thyroid disease or autoimmune diseases. However, ask your doctor. Best regards

  17. Eleonora 5 years ago

    Good evening, I performed thyroid tests and the reports are:
    TSH 0.23 (0.55-4.78)
    FT3 4.04 (2.3-4.2)
    FT4 1.42 (0.89-1.76)
    The doctor felt it was right to prescribe them because for some time I have been suffering from insomnia, anxiety, diarrhea / constipation (I have suffered for years from chronic diarrhea) hand tremors, tachycardia (beats at rest never less than 100) hair loss and I am perpetually " listless "and depressed ..
    What do you recommend? Thank you in advance

    • Testlevels 5 years ago

      Hi, it is a picture of low tsh with thyroid hormones at the upper limits of norm, it could be nothing like evolving in a picture of full-blown hyperthyroidism. Thyroid ultrasound and the search for thyroid autoantibodies will be performed. Show the tests to your doctor or endocrinologist who will advise you on what to do. Best regards

  18. juliet 5 years ago

    good morning subjected to thyroidectomy on 22 02 2016 before eutirox from 0.75 and 100 every other day now thyroid IBSA74 plus 21'40.TSH0.02 T40.97 T3 3.26.
    because my TSH is always low having normal T3 and T4
    I have tremors dizziness I lose a lot of hair and my nails flake off and do not grow
    What can depend on, thank you right now My name is Giulietts and I am 57 years old

    • Testlevels 5 years ago

      Hi, the low tsh could mean that the replacement therapy dose can be slightly modulated, in any case the thyroid hormone values are normal and that's what matters. In any case, always refer to your doctor or to the endocrinologist specialist who follows you. Best regards

  19. Sonia 5 years ago

    Hi, I wanted to ask for advice
    I am 53 years old and I underwent a total thyroidectomy in 2011 for a large lump, which fortunately turned out to be benign (despite a T3 with the aspirated needle).
    I did blood tests a few days ago and I have very low TSH:
    TSH 0.08 (0.34-5.60)
    FT3 3.52 (2.99-4.40)
    FT4 0.97 (0.61-1.12)
    For more than a year I have been taking Eutirox from 100 every day and on Saturdays and Sundays from 125, clearly following the control of previous blood tests.
    Too high the dosage ?? What would you recommend?
    Thanks in advance

    • Testlevels 5 years ago

      Hi, the reduction in TSH could be only momentary, the result of a normal fluctuation of thyroid hormones and consequently of the thyroid hormone, possibly linked to a greater absorption or reduced clearance of the levothyroxine that you take (i.e. Eutirox). Show the tests to your doctor before you think about a dose change. Sincerely

  20. Taty 5 years ago

    Good morning ... me or taken the results and / or the TSH: 0.02 is there to worry in my case? What are the risks, what should I do? Many thanks in advance

    • Testlevels 5 years ago

      Hi, TSH is reduced, what are thyroid hormones and anti thyroid antibodies like? Do you have any symptoms of hyperthyroidism? Show the tests to your doctor, best regards

  21. Laura Mattei 5 years ago

    Hello, can I take advantage too? I have withdrawn the blood tests and there are some values that intrigue me.
    I am a 47-year-old woman and I did the tests because I am always tired, I drink a lot, I am very thirsty at night but my blood sugar is fine - 89 mg / dl (range 70-100)
    FT4 0.85 (range 0.8-1.76)
    TSH 1.46 (range 0.55-4.78). Even if they fall within the range they are a bit short it seems to me.
    While creatinine 0.84 mg / d (range 0.5-0.8) total bilirubin 1.32 mg / d (range <1.2) and direct bilirubin 0.51 mg / dL (range <0.25) are a little high. . Thanks

    • Testlevels 5 years ago

      Hi, TSH and free thyroxine are normal, thyroid function is preserved. There slightly elevated creatinine it could simply depend on the fact that he had drunk little and was a little dehydrated, the elevated bilirubin should be deepened by performing AST, ALT, GGT, ALP and possible abdomen echo. Always and in any case refer to the attending physician to whom to view the blood tests. Best regards

  22. Gabriella 5 years ago

    Hello, I'm 41 years old and for 6 years (with the last pregnancy), I discovered that I suffer from hypothyroidism. .. every 6 months I check, but I continue to increase the tablet (currently 125) ... the last exam, gives me TSH 0.127
    FT4 1.36
    I could have some clarification from you, thank you very much
    Gabriella

    • Testlevels 5 years ago

      Hi, the TSH is quite low, the doctor who follows you could also evaluate a possible reduction of Levothyroxine. Always and in any case refer to your doctor. Best regards

  23. Giulia Lupi 5 years ago

    Good morning
    I am an 81 year old lady, I recently did blood tests and they found the following values:
    TSH 0.090
    FT3 3.04
    FT4 1.33
    Blood sugar 131
    Ves 25
    Hemoglobin 11.5
    Hematocrocyte 34.8
    RDW 15.7
    The endocrinologist specialist to whom I went previously had prescribed me Eutirox 25, currently I go to another specialist who in the last visit, having detected the results of the tests, suspended me Eutirox 25. and greeting
    Giulia

    • Testlevels 5 years ago

      Hi, it is assumed that the endocrinologist has rightly suspended Eutirox due to suppressed TSH. Thyroid function will be checked shortly. Always and in any case rely on the care provider. Best regards

  24. Carmen 5 years ago

    hi could I have an opinion between the latest and previous analyzes?

    • Testlevels 5 years ago

      sure

  25. Francesca Franchi 5 years ago

    Hello, 65 years old, without thyroid since 2000, Eutirox 125 and Antiarrhythmic BISOPROLOL 1,25.
    The analyzes carried out show the following values:
    TSH 0.02; FT3 3.58; FT4 1.28
    I don't have any symptoms of hyperthyroidism and my doctor told me it's fine. Can I continue like this?
    Thanks

    • Testlevels 5 years ago

      Hi, if the thyroid hormone values are well balanced I'd say it's okay. Always rely on your doctor, who knows your medical history and should know how to advise you in the best possible way. Best regards.

  26. enzo barcacci 5 years ago

    Good morning,
    I did thyroid tests and it turns out:
    thyroid stimulating hormone TSH ULTRA 0.280
    FT3 3.60
    FT4 1.53
    I have been using eutirox 0.75 for a long time
    I am 68 years old and I suffer from hypertension ..
    Welcome an opinion on the above values
    thanks

    • Testlevels 5 years ago

      TSH slightly suppressed and thyroxine and triiodothyronine in the norm. Nothing in particular. Show the tests to your doctor and follow his instructions. Best regards.

  27. lorenzo Conte 5 years ago

    I take eutirox for 0.75 + 0.125 x 4 days - for three days only 0.75
    done FT3 4.35 results analysis
    FT4 17.04
    TSH 0.09. the TSH is low. the dosage to be taken than how much must be seen that before I always took 0.75?
    Thanks

    • Testlevels 5 years ago

      Hi, it is probably necessary to reduce the dose of eutirox, IN ANY CASE always after having seen the tests to your doctor, who will tell you what to do. Best regards.

  28. Fabiana 5 years ago

    Hello, I'm pregnant in the ninth week this morning I withdraw the exams which are all perfect except tsh 0.08, on the phone the gynecologist told me that it's okay, but reading here and there about the possible consequences I got a bit of panic!

    • Testlevels 5 years ago

      Hi, in fact it is a low value, but probably the gynecologist has some additional data that allowed her to reassure her (thyroid hormone levels?). If in doubt, ask another specialist for a second opinion. Best regards.

  29. Anna 5 years ago

    Hi I am a 33 year old girl since January I am following the therapy with levothyroxine 50 (for the first two months every day, in the last two months from Mon to Fri) a week ago I performed the tests and I have the tsh 0.030 Ui / ml (reference values 0.20-4.00) Ft3 4.28 pg / ml (values 1.58-4.1) ft4 in the norm got and gpt in the norm and prolactinemia 28.30 ng / ml (values 1.9-25) I'm looking for a pregnancy I read that the tsh too low can give problems both in conception and the fetus I would like to know your opinion.

    • Testlevels 5 years ago

      I would say the important thing is that thyroid hormones are within the normal range. I refer you to reading this part of the article on pregnancy, in any case, contact your gynecologist and / or the endocrinologist who follows you and they will know how to modulate the thyroid replacement therapy appropriately. Best regards

      • Anna 5 years ago

        Thank you for answering, I called both the gynecologist and the endocrinologist both of them replied that everything is ok, that I can search for pregnancy safely and to decrease the therapy by taking Tiche 50 on Mon, Wed and Friday repeating the exams in two months ; but I would like to repeat them in a month so as not to suppress too much the tsh which is already very low.
        I am worried because I have already had a miscarriage in the first weeks of pregnancy and I am a little scared.

  30. mary 5 years ago

    except from tests done in September 2015 the tsh was 0, 26, ft3 2.47, ft4 1.12 then I was found a lump with a benign result, I have been taking eutirox for 50 since then the doctor tells me that the tsh must get off, but even today I don't understand why. up to January it had reached 0.05 ft3 2.33 ft4 0.98 while the May analyzes are tsh 0.17, ft3 2.40 ft4 1.14

    • Testlevels 5 years ago

      If the units of measurement are those commonly used in Italian laboratories, the levels of thyroid hormones are normal. Always rely on the attending physician. Best regards

  31. anto 5 years ago

    Could I kindly know an opinion?
    THYREOTROPINE (TSH) 4.515 2
    - 12 years: 0.64 - 6.27 12
    - 18 years: 0.51 - 4.94
    > 18 years: 0.55 - 4.78
    FREE TRIODOTHYRONINE (FT3) 2.90 2.3 - 4.2
    FREE THYROXINE (FT4) 1.12
    Euthyroid: 0.89 - 1.76 Hypothyroid: 1.76
    ANTI-THYREOPEROXIDASE ANTIBODIES 87.2 <60.0 *
    ANTI-THYROOGLOBULIN NICBODIES <15.0 <60.0

    thank you so much

    • Testlevels 5 years ago

      Hi, if thyroid function is substantially normal, with only a modest increase in anti-thyroid peroxidase antibodies, which may also have no significance. Why did you carry out these analyzes? However, always refer to your doctor. Best regards

  32. adriana 5 years ago

    hi I did the thyrotropin (tsh) tests, the result is 2850. too high or too low? Thanks in advance

    • Testlevels 5 years ago

      TSH is normal. Always and comuqneu refer to the carer, best regards

  33. Valeria 5 years ago

    Hello
    I have been taking Eutirox 75 mg for some years. I just withdrew the blood tests, with the following results for hormones:
    - TSH 1500 uUI / ml;
    - fT4 10.5 pg / ml;
    - fT3 2.1 pg / ml (lower than the reference ranges).
    The glucose value (72 mg / dL) is also below the reference range.
    I follow a healthy diet, to keep cholesterol under control, which I was a bit high.
    I have already requested a visit to the endocrinologist, but I would like to know if there could be a correlation between hypothyroidism and this low glucose value, and what it could be.
    Thanks in advance, greetings
    Valeria

    • Testlevels 5 years ago

      Hi, theoretically hypoglycemia and hypothyroidism can be associated (in your case, however, the replacement therapy is well managed, the values of free thyroxin are normal); on the other hand, the hypoglycemia could simply be linked to the fact that he probably took the tests on an empty stomach. Show the tests to the endocrinologist who will advise you on the most appropriate procedure.

  34. Anna 5 years ago

    Not yet, what is thyroid autoimmune

    • Testlevels 5 years ago

      Thyroid autoimmunity consists in the analysis of antibodies to TSH receptor, to thyroglobulin and to thyroperoxidase. It is used to understand if there is an autoimmune cause of an altered thyroid function.

  35. Anna 5 years ago

    Hi I did the tests for the thyroid. Because for a year I have been getting red and brown spots on my feet, belly and hand8.e hi un tsh0.34e ft3 3.70e ft4 1.37

    • Testlevels 5 years ago

      free thyroxine and triiodothyronine (fT4 and fT3) are normal, TSH is slightly reduced compared to the normal range. Did you perform thyroid autoimmunity? Have the tests been shown to the attending physician?

  36. Christian 5 years ago

    HELLO, I HAVE JUST WITHDRAWN THE ANALYSIS REQUIRED FROM THE FIRST AID WHERE I HAVE BEEN RECOVERED FOR A CARDIO VERSION AND IT WAS
    FT3 pg / mL (2.30 - 4.20)
    FT4 ng / dL 0.8 - 1.76
    TSH 0.47 * ùUI / mL (0.55 - 4.78)
    how should i move thanks in advance for the reply.

    • Christian 5 years ago

      sorry ft3 4.10; ft4 1.15 TSH 0.47 on the values which o overwritten

      • Testlevels 5 years ago

        Hi, the thyroid stimulating hormone is just reduced, with free triiodothyronine and free thyroxine in the norm. thyroid auto antibodies must be checked and a thyroid echo performed if necessary, also considering (if I understand correctly) the arrhythmic episode recently subjected to cardioversion. Obviously, refer to your doctor who will prescribe the most appropriate tests. Best regards

  37. Silvia 5 years ago

    Hi I have been taking 25 microgtams for two years because they told me I have a mild hypothyroidism and the values then were: TSH 3.68 and t4 0.75
    During the week I took the exams and now they are tsh0,05 and t4 1,25. I would like to know your opinion ???

    • Testlevels 5 years ago

      Hi, the tsh is a bit suppressed (ie low), the t4 is low (and sure the ft4 has not actually been dosed which would be normal at those values?).

  38. Mery 6 years ago

    Hi I had a total internship 5 months ago. I did the exams t3 2.45 (1.5 -3.5) t4 1.08 (0.7 -1.9) tsh 0.375 (0.49-4.7) I take 150 eutirox, maybe the tsh a little bit bass . Is it true that those with lactose intolerance nn go bn eutirox? Xchè I tested positive. .thanks. .Sincerely

    • admin 6 years ago

      Hi, the replacement therapy is quite good, he will evaluate with the endocrinologist whether to eventually reduce Levothyroxine to 125 mcg a few days a week. Eutirox contains lactose among the excipients, if it gives you symptoms of intolerance (diarrhea, abdominal swelling, etc.) you can think about a change of drug, otherwise it can also continue with the current one. In any case, as we always repeat, every decision will be made with the specialist who follows it!

  39. Diego 6 years ago

    Hi, I'm a 37-year-old boy, after a cardiological check-up for some sometimes strange beats, which lasted a few days, I did the thyroid tests, results
    Ft3 6.07. Ref. 1.71-3.71
    Ft4 2.02. Ref. 0.70- 1.48
    Tsh 0.01. Ref 0.35- 4.94
    What could be causing this hyperthyroidism ????

    • admin 6 years ago

      Hi, yours is a classic hyperthyroid picture with low TSH and ft3 ft4 high. The most frequent cause of hyperthyroidism is Graves' disease, an autoimmune disease characterized by the fact that abnormal antibodies, antibodies to TSH receptor (ab anti-TSH), stimulate the thyroid to produce more thyroid hormones than normal. Other common causes are Plummer's adenoma (a thyroid nodule that begins to produce exaggerated doses of hormones), toxic multinodular goiter (thyroid with one or more nodularities producing too much thyroxine and triiodothyronine) .Other less frequent causes are thyroid inflammation (thyroiditis) ), pituitary nodules .. Perform an anti-thyroid antibody scan and an ultrasound and consult an endocrinologist

  40. laquidara Giuseppakm i 6 years ago

    My values are slightly lower I have to worry .. TSH Thyrotropin 0.101 UIl mL

    • admin 6 years ago

      Hello, it is a low TSH, your doctor will have surely recommended the dosage of thyroid hormones and anti-thyroid antibodies

  41. Nicole 6 years ago

    Good morning,
    I performed thyroid ultrasound and a hypoechoic formation was found with small colloid-cystic areas of about 13 mm.
    Thyroid of regular size and reactive lymph nodes in the latero-cervical area to the right with a maximum diameter of 12 mm.

    The exams show:
    - CALCITONIN <2.00 pg / ml
    - FREE T4 1.11 ng / dl
    - TSH 0.341 mcUI / ml

    I have already booked the visit, but I would like to have an opinion.

    Thanks a lot!

    • admin 6 years ago

      Hello, the tests indicate normal thyroid function with a TSH just below normal values. Calcitonin, a marker used for medullary thyroid carcinoma, is less than 2 pg / ml, therefore normal. The specialist will decide whether to propose further tests (thyroid autoantibodies) and whether to monitor the lump with an ultrasound in a few months, or whether to prick it for a fine needle aspiration to evaluate its composition. It seems nothing striking, in any case refer to what you will be told during the visit.

  42. Mara 6 years ago

    Good evening,
    I would like to know if the following values:
    TSH REFLEX 0.02 (0.4-4.0)
    FT4 2.14 (0.75-1.45)
    they can be caused by taking Amiodarone, even if suspended for a few months. If so, can they gradually return to normal without treatment?
    Thank you

    • admin 6 years ago

      It is a picture of hyperthyroidism with almost suppressed low TSH and high free thyroxine (fT4), it could also be linked to amiodarone. Amiodarone hyperthyroidism can continue even months after its discontinuation as amiodarone and its metabolite desethylamiodarone (DEA) accumulate in peripheral tissues and continue to supply excess iodine (in the case of AIT type 1) or to stimulate release of circulating thyroid hormones T3 and T4 formed during a previous thyroid inflammatory process induced by amiodarone itself (in the case of AIT type 2), for a long time before being exhausted. In most cases, the values fall over time without the need for suppressive therapy (methimazole, propityluracil). In any case, consult your doctor.

      • Mara 6 years ago

        Thank you very much for the prompt and thorough reply. Best regards

  43. joan 6 years ago

    30/6/2015 blood test performed

    TSH 0.014
    ft4 1.15

    tsh too low? Thanks for the reply

    • admin 6 years ago

      Hi, there are no units of measurement, it still seems like a subclinical hyperthyroidism (low TSH but normal Ft4). The picture should be investigated with auto antibodies and ultrasound, in any case refer to the attending physician.

  44. kalina 6 years ago

    thyrotropin, 0.060

    • admin 6 years ago

      It's a very low TSH. Do you have any symptoms of hyperthyroidism? Anxiety, tachycardia episodes, recent weight loss, do you go to the toilet frequently? .. I think it is necessary, if you have not already done so, to perform the dosage of fT3 and fT4 and anti-thyroid antibodies: anti-thyroglobulin antibodies (anti -TGB), antibodies to thyroperoxidase (anti-TPO) and antibodies to thyrotropin receptor (anti-TSH). In any case, consult your doctor.

      • Buson Mirella 5 years ago

        I have lost weight, dry skin, I lose hair, I am nervous, I go to the bathroom many times at night, I am hot, anxious TSH 0.073

        • Testlevels 5 years ago

          Hi, TSH is normal, did you perform fT3 and fT4 dosage? CBC?

    • Daisy 5 years ago

      thanks a lot
      Good night

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