A thyroid-stimulating immunoglobulin (TSI) test is a blood test that can help diagnose Graves’ disease, an autoimmune condition that causes an overactive thyroid. A TSI test measures levels of TSIs in ...

Subclinical hyperthyroidism means that a person has low or undetectable levels of thyroid-stimulating hormone (TSH) with normal levels of free thyroid hormones. It usually does not cause symptoms. The ...

Treatments for hyperthyroidism can stop the overproduction of thyroid hormones. But you’ll need to take medications to manage your thyroid for the rest of your life. Hyperthyroidism, or overactive ...