Medically reviewed by Danielle Weiss, MD Your thyroid-stimulating hormone (TSH) levels are important for many bodily functions, like your metabolism, weight management, body temperature regulation, ...

High TSH levels indicate that a person has an underactive thyroid, meaning it is not producing enough essential hormones. Symptoms of hypothyroidism include fatigue, weight gain, and thinning hair ...

Generally, high TSH can indicate hypothyroidism, while low TSH can indicate hyperthyroidism, though the levels and severities of these can vary. Low T4, normal TSH Testing TSH levels does not ...

Medically reviewed by Kelly Wood, MD Normal thyroid-stimulating hormone (TSH) levels generally fall between 0.5 and 5.0 milliunits per liter (mU/L). If your TSH level is higher than 5.0 mU/L it ...

Your doctor will order a TSH test if you exhibit thyroid disorder symptoms like hair loss or fatigue. High TSH levels could be a sign of hypothyroidism while low TSH levels may signal hyperthyroidism.

If the TSH level remains persistently low, usually in the presence of high thyroid hormone (T3 and/or T4) levels, the most common reason for hyperthyroidism is Graves disease, in which there are ...

Not every elevated TSH value indicates an underactive thyroid gland, ... or a high need for sleep. If there are symptoms, the thyroid function must be clarified further.

If you have no symptoms, no antibodies and normal free T4 levels, then I don’t think you need treatment, but just to have periodic tests of both TSH and free T4.

I saw an elderly man with thyroid-stimulating hormone levels that have remained in the 20 mIU/L to 40 mIU/L range, despite being prescribed 200 mcg or more of levothyroxine per day. The patient ...

Despite normal TSH tests, these patients still have many nagging symptoms of hypothyroidism. "Patients complain of being depressed, slow and having a foggy mind," said Rush's Antonio C. Bianco, MD ...

Furthermore, the finding of a markedly elevated level of plasma thyrotropic activity distinguishes the hyperthyroidism in this case from that of Graves's disease, in which normal or low plasma TSH ...