How do you test for a thyroid problem?

The T3 test checks for levels of the hormone triiodothyronine. It's usually ordered if T4 tests and TSH tests suggest hyperthyroidism. The T3 test may also be ordered if you're showing signs of an overactive thyroid gland. The normal range for the T3 is 100-200 nanograms of hormone per deciliter of blood. read more

The tests measure hormones from the thyroid itself, as well as thyroid-stimulating hormone (TSH), a chemical released by the pituitary gland that triggers your thyroid. When you are hypothyroid, you have higher TSH levels because your body is trying to tell your thyroid to make more hormones. read more

One self-check that may detect some thyroid problems is called the “thyroid neck check.” To perform this test, hold a mirror up so that you can see your neck, just below your Adam's apple and above your collarbone. Then, tip your head back, and keeping an eye on this area, take a drink of water and swallow. As you swallow, look at your neck. read more

These tests might include more blood testing for thyroid antibodies, nuclear medicine thyroid scanning, ultrasound of the thyroid gland, or others. If thyroid cancer is suspected and surgery may be required, your physician may ask for a blood test known as thyroglobulin. read more