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The Thyroid Book
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Your Thyroid Gland
It doesn't look like much–a small, butterfly-shaped gland, just below your Adam's apple. But your thyroid gland has a big effect on the way your body works. The thyroid controls your body's energy level, and problems with your thyroid gland can interfere with your life. However, these problems can be treated. You and your doctor can discuss how best to handle your thyroid problem.

Problems with Your Thyroid
You may not hear much about thyroid problems, but they're common and affect many people. Having a thyroid problem may mean that your thyroid gland is underactive and doesn't work hard enough. Or, it may mean that your gland is overactive and works too hard. Your thyroid gland may also grow larger or develop lumps.

An Underactive Thyroid
When the thyroid doesn't work hard enough, it's called hypothyroidism. If you have hypothyroidism, your body runs more slowly and you have less energy. You may notice one or more of these symptoms:
  • Feeling sluggish and tired
  • Getting cold easily
  • Gaining weight more easily
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