A GUIDE TO TSH BLOOD TESTS

A TSH blood test is a simple procedure that measures the amount of thyroid-stimulating hormone (TSH) in your blood. TSH is produced by the pituitary gland, located at the base of your skull, and it controls your thyroid gland to produce hormones. This test can help diagnose whether your thyroid gland is overactive (hyperthyroidism), underactive (hy