Thyroid-Stimulating Hormone (TSH)

A test for Reference thyroid-stimulating hormone (TSH) Opens New Window is done to:

• Find out whether the thyroid gland is working properly.
  • An underactive thyroid gland (Reference hypothyroidism Opens New Window) can cause symptoms such as weight gain, tiredness, dry skin, constipation, a feeling of being too cold, or frequent menstrual periods.
  • An overactive thyroid (Reference hyperthyroidism Opens New Window) can cause symptoms such as weight loss, rapid heart rate, nervousness, diarrhea, a feeling of being too hot, or irregular menstrual periods.
• Find the cause of an underactive thyroid gland (hypothyroidism). TSH levels can help determine whether hypothyroidism is due to a damaged thyroid gland or some other cause (such as a problem with the pituitary gland or the hypothalamus).
• Keep track of treatment with thyroid replacement medicine for people who have hypothyroidism.
• Keep track of thyroid gland function in people who are being treated for hyperthyroidism. This treatment may include antithyroid medicine, surgery, or radiation therapy.
• Double-check the diagnosis of an underactive thyroid gland in a newborn (congenital hypothyroidism).

© 1995-2011, Healthwise, Incorporated. Healthwise, Healthwise for every health decision, and the Healthwise logo are trademarks of Healthwise, Incorporated.

This information does not replace the advice of a doctor. Healthwise, Incorporated disclaims any warranty or liability for your use of this information. Your use of this information means that you agree to the Reference Terms of Use. Reference How this information was developed to help you make better health decisions.