Jul 25, 2022 · Thyroid-stimulating hormone (TSH) triggers your thyroid to release its hormones. High TSH levels usually indicate hypothyroidism and low levels, hyperthyroidism.

Dec 10, 2025 · Learn how TSH levels indicate thyroid health. High TSH suggests an underactive thyroid; low levels point to overactivity.

Apr 22, 2025 · This article describes the TSH test and its results. We also discuss what high and low TSH levels indicate and available treatments.

Nov 22, 2025 · A TSH test is done to find out if your thyroid gland is working the way it should. It can tell you if your thyroid gland is overactive (hyperthyroidism) or underactive (hypothyroidism).

Oct 30, 2025 · A doctor can test your TSH levels with a blood test to diagnose thyroid disease. Normal TSH levels range from 0.4-4.0 mUI/mL, which indicates proper thyroid function.

TSH stands for thyroid stimulating hormone. Another name for it is thyrotropin. A TSH test is a blood test that measures this hormone. A TSH level that is too high or too low may be a sign of …

TSH (with a half-life of about an hour) stimulates the thyroid gland to secrete the hormone thyroxine (T 4), which has only a slight effect on metabolism. T 4 is converted to …

Normal TSH values range from 0.5 to 5 microunits per milliliter (µU/mL). A too-high TSH level means your thyroid gland is not producing enough thyroxine, which indicates hypothyroidism. …

Mar 24, 2022 · Unusually low TSH levels may indicate an overactive thyroid, with symptoms like weight loss and rapid heart rate. Unusually high TSH levels often suggest an underactive …

Aug 1, 2025 · Thyroid level tests, including the TSH test, help doctors diagnose thyroid conditions, including hypothyroidism or hyperthyroidism. Treatment may include hormones or other …