TSH

The thyroid-stimulating hormone (TSH) test measures the amount of TSH in the blood and helps to diagnose thyroid disorders. The thyroid hormone plays an important role in regulating weight, body temperature, and even mood. Having an overactive or underactive thyroid can cause health issues that interfere with daily life.

A high TSH and low thyroid hormone level can indicate primary hypothyroidism whereas a low TSH and a high thyroid hormone level can indicate primary hyperthyroidism. Normal TSH ranges can alter depending on a person’s age, sex, and body weight.