TSH stands for thyroid-stimulating hormone. A TSH blood test would check the levels of these hormones, which help in regulating your metabolism and blood pressure. Hyperthyroidism is the term used If your TSH level is too low. Hypothryoidism refers to high levels of TSH. Symptoms should be taken into account when checking these hormone levels, since no one test can paint the entire picture. There are medications that can help regulate your thyroid-stimulating hormone, so talk with your doctor about any concerns you have.