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Anonymous 4, 2013

Created By: Mariela Dagio
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http://www.webmd.com/a-to-z-guides/hyperthyroidism-topic-overview 


What is hypothyroidism?


[1] Hyperthyroidism means your thyroid makes too much thyroid hormone. Your thyroid is a gland in the front of your neck . It controls your metabolism, which is how your body turns food into energy. It also affects your heart, muscles, bones, and cholesterol.

[2] Having too much thyroid hormone can make a lot of things in your body speed up. You may lose weight quickly, have a fast heartbeat, sweat a lot, or feel nervous and moody. Or you may have no symptoms at all. While your doctor is doing a test for another reason, he or she may discover that you have hyperthyroidism.

Hyperthyroidism is easily treated. With treatment, you can lead a healthy life. Without treatment, hyperthyroidism can lead to serious heart problems, bone problems, and a dangerous condition called thyroid storm.

What causes hyperthyroidism?

Graves' disease causes most hyperthyroidism. In Graves? disease, the body's natural defense (immune) system attacks the thyroid gland. The thyroid fights back by making too much thyroid hormone. Like many thyroid problems, it often runs in families.

Sometimes hyperthyroidism is caused by a swollen thyroid or small growths in the thyroid called thyroid nodules.

This topic focuses on hyperthyroidism caused by Graves' disease.
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