What is Hyperthyroidism?

Hyperthyroidism makes the body speed up. It occurs when there is too much thyroid hormone in the blood (“hyper” means “too much”). Nearly 10 times more frequent in women, it affects about 2% of all women in the United States.

The most common cause of hyperthyroidism, Graves’ disease, is caused by problems with the immune system and tends to run in families. It affects at least 2.5 million Americans, including Olympic athlete Gail Devers who won a gold medal in track after being diagnosed with and treated for Graves’ disease.

Symptoms include:

  • fast heart rate
  • nervousness
  • increased perspiration
  • muscle weakness
  • trembling hands
  • weight loss
  • hair loss
  • skin changes
  • increased frequency of bowel movements
  • decreased menstrual flow and less frequent menstrual flow
  • goiter
  • eyes that seem to be popping out of their sockets.

The symptoms of hyperthyroidism rarely occur all at once. However, if you have more than one of these symptoms, and they continue for some time, you should see your doctor.


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[...] thyroid gland might produce too much hormone (hyperthyroidism), making the body use energy faster than it should, or too little hormone (hypothyroidism), making [...]



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