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Doctor insights on: What Does Low Tsh Level Mean

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What does a low TSH level mean?

What does a low TSH level mean?

Need to look at T3 (liothyronine): And free t4. Low tsh, depending on the sensitivity of the assay, indicates thyroid hyper-function. However, the suspected hyperthyroidism needs to be confirmed with high levels of T3 (liothyronine) and free t4. All lab tests need to be evaluated in the clinical context and it would be prudent to take up the issue with your doctor. ...Read more

Dr. Quang Nguyen
893 doctors shared insights

Thyroid Stimulating Hormone (Definition)

A TSH test measures the amount of thyroid stimulating hormone (TSH) in your blood. TSH is produced by the pituitary gland and tells the thyroid gland to make and release the hormones thyroxine ...Read more


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Can you tell me is 23.69 a high or low TSH level?

Can you tell me is 23.69 a high or low TSH level?

High: The normal range for a TSH usually is up to 4.5 for most labs. This is a higher than normal number. ...Read more

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Hyperthyroidism and weight gain, can a low TSH level cause weight gain? And how would menopause effect TSH level?

Hyperthyroidism and weight gain, can a low TSH level cause weight gain? And how would menopause effect TSH level?

No: Rarely hyperthyroidism manifested by a low TSH and elevated thyroid hormones can cause increased hunger leading to weight gain. Most hyperthyroids lose (muscle) weight. Menopause has no effect on TSH levels, but as we age hypothyroidism with increased TSH becomes more likely. 20% of women on medicare have elevated TSH and have frank or subclinical hypothyroidism. ...Read more

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Can taking too much Synthroid (thyroxine) plus cytomel, therefore having a very low TSH level, cause seizures?

Can taking too much Synthroid (thyroxine) plus cytomel, therefore having a very low TSH level, cause seizures?

Possible: Both high and low thyroid states can be associated with seizures. Seizures can be seen in 5-10% of high thyroid states and even more commonly when it is due to an overdose with medication. If you are experiencing this, go to the nearest er as this condition is life-threatening and needs immediate attention. Your doctors will also search for other conditions that may be causing seizures. ...Read more

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My TSH level is low 0.43 what does this mean exactly?

My TSH level is low 0.43   what does this mean exactly?

More workup: Currently, it points to hyperthyroidism but you need to complete the work up to know for sure. At the very least, i would repeat the TSH along with the free hormones T4 and t3 (liothyronine). If they also point to hyperthyroidism, then proceed further to find the exact cause for this. Tsh alone does not give you a complete picture. ...Read more

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MY TSH level is 0.02 (Low?) and T4 is 0.66 (Low?) What does this mean. I have been on synthroid (thyroxine) 50 MCG for hypothyroid for 3 months

See below: All laboratory results need to be interpreted in the clinical context and the doctor who ordered the tests is usually in the best position to do that. Having said that, given your TSH level you are on a sufficient dose of medication. Please do keep your follow-up appointments for monitoring the treatment. ...Read more

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I am diagnosed with low TSH and normal T3 and T4 level...What does it mean?Please suggest me treatment...

I am diagnosed with low TSH and normal T3 and T4 level...What does it mean?Please suggest me treatment...

T3 and T4: A low TSH should not affect your thyroid glands! If you are having a problem please see an Endocrinologist. Should not be necessary. ...Read more

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Can Lamotrigine (Lamictal) affect TSH levels? Also, what do low TSH mean (if T3 (liothyronine) and T4 are normal)?

Can Lamotrigine (Lamictal) affect TSH levels?

Also, what do low TSH mean (if T3 (liothyronine) and T4 are normal)?

Not alot: Thyroid interaction is not common with Lamictal, however as with all medications for each individual that can be a possibility. As to your low TSH that is usually a resonse to elevated T3, (liothyronine) T4. Remember that there can be variations in your thyroid measurements from one time to another. How do you feel. Do you have thyoid symptoms: cold, tired, fatigued, skin or nail changes? ...Read more

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Could a low TSH (.28) & normal T3 (liothyronine) & T4 levels mean a Pituitary issue? Or is that more typical of hypothyroidism? Would high Chloride (111) effect it?

Could a low TSH (.28) & normal T3 (liothyronine) & T4 levels mean a Pituitary issue? Or is that more typical of hypothyroidism? Would high Chloride (111) effect it?

Means pituitary is: A TSH of 0.28 with normal free T4 and free T3 (liothyronine) likely means the pituitary is working properly. A TSH of 0.1-0.4 is lower than the reference range, which means about 2.5% of normal people have a TSH or 0.1-0.4. Thus, one hopes she is normal. Her endocrinologist can follow and recheck her levels in 4-6 weeks to confirm that her levels are stable (TSH not dropping lower; T4 or T3 (liothyronine) not above normal). ...Read more

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MY TSH LEVEL IS 12.22 WHAT DOES IT MEAN?

MY TSH LEVEL IS 12.22 WHAT DOES IT MEAN?

Under active thyroid: TSH level is elevated when the thyroid is under active (hypothyroidism). Depending on the reference range for the lab performing the test, this level would be mildly elevated, suggestive of hypothyroidism. Your doctor may want to repeat the test to confirm and look at the clinical picture to decide treatment is needed. ...Read more

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