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Symptoms of Hyperthyroidism
- Restlessness, nervousness, and irritability
- Fatigue and weakness may follow the restlessness and nervousness
- Heat intolerance
- Heart palpitations, irregular heartbeat, skipped beats
- Tachycardia—Rapid heartbeat and pulse.
- Unexplained weight loss—An increased metabolism means your body is burning calories more rapidly, thus you may lose weight even though you are eating more. However, 5%-10% of people with hyperthyroidism gain weight because they are eating more.
- Warm, moist skin
- Increased bowel movements—Food travels more quickly through the gastrointestinal tract.
- Insomnia—You may have trouble sleeping in spite of the fact that you feel tired all the time.
- Tremor—If you stretch out your fingers, you may have a fine tremor.
- Menstrual irregularity
- Loss of libido
- Fine hair texture—Up to 40% of patients experience some baldness. This can last for months after the thyroid hormone level has been restored to normal
- Bulging eyes (called exophthalmos)—This can occur in Graves disease.
- Shortness of breath—This may occur when the hyperthyroidism is severe and the heart rate is rapid or there is an irregular pulse. Severe hyperthyroidism can result in heart failure.
- Swelling in legs
- Heart failure
- Atrial fibrillation
- No appetite
- Muscle wasting
- Reviewer: Kim A. Carmichael, MD
- Review Date: 12/2015
- Update Date: 12/20/2014