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 ...
Thyroid stimulating hormone (TSH) tells the thyroid gland to produce hormones. High TSH levels usually indicate that the thyroid is underactive and needs more stimulation in order to work. But, some ...
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.