Overview It's estimated that as many as 25 million Americans have a thyroid problem, and half of them have no idea that they do. Hypothyroidism, or an under-active thyroid, accounts for 90% of all thyroid imbalances. The thyroid, a butterfly-shaped gland in the center of your neck, is the master gland of metabolism. How well your thyroid is functioning is inter-related with every system in your body. If your thyroid is not running optimally, then neither are you. Symptoms Weight gain or Loss : An unexplained change in weight is one of the most common signs of a thyroid disorder. Weight gain may signal low levels of thyroid hormones, a condition called hypothyroidism. In contrast, if the thyroid produces more hormones than the body needs, you may lose weight unexpectedly. This is known as hyperthyroidism. Hypothyroidism is far more common. Swelling in the Neck: A swelling or enlargement in the neck is a visible clue that something may be wrong with the ...
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