TSH influences thyroid hormones that control heart rate, metabolism, sleep, and mood. High TSH levels usually mean the thyroid is underactive, which is called hypothyroidism. Low TSH levels suggest an ...
A TSH blood test can help your doctor determine if your thyroid gland is working as it should. In cases of hyperthyroidism, TSH levels usually fall below 0.4 mIU/L, indicating an overactive thyroid.
Hyperthyroidism affects TSH levels, causing them to fall below expected ranges. Hyperthyroidism can occur when the thyroid gland in the neck produces too much thyroid hormones, including ...