Hyperthyroidism is the result of an over-active thyroid. Symptoms include: sudden weight loss, rapid heartbeat, irregular heartbeat or pounding of your heart, increased appetite, nervousness, anxiety, irritability, tremor, sweating, changes in menstrual patterns, increased sensitivity to heat, more frequent bowel movements, an enlarged thyroid gland, fatigue, muscle weakness and difficulty sleeping. This problem can be controlled by your doctor with medications, tests and possibly surgery if severe enough.

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