Hyperthyroidism, or overactive thyroid, results from the overproduction of thyroid hormones.  As a result, the body’s metabolism is elevated.  The disease is characterized by the production of thyroid-stimulating immunoglobulin, which causes inflammation of the thyroid and excess production of hormones.  Hyperthyroidism is less common than hypothyroidism. The most common cause of hyperthyroidism in the United States is the autoimmune disorder Graves’ disease. Hyperthyroidism causes a wide range of symptoms, so it may be difficult to tell if you have hyperthyroidism based on symptoms alone. You will need to see your doctor for tests to determine if hyperthyroidism is the cause of your symptoms. Symptoms of hyperthyroidism may include:  Weight loss Fatigue Rapid heartbeat Irregular heartbeat Anxiety or nervousness Irritability Protruding eyes Trouble sleeping Trembling in the hand and fingers Increased sweating Feeling hot when others do not Muscle weakness Diarrhea Change in menstrual cycles Weak bones Infertility Enlargement of the thyroid gland (goiter) Erectile dysfunction Decreased sexual libido Some people are at higher risk of developing hyperthyroidism due to certain risk factors. Risk factors for hyperthyroidism include:  Advancing age Assigned female at birth Family history of hyperthyroidism Iodine supplementation after deficiency Autoimmune disorders such as type 1 diabetes, rheumatoid arthritis, and lupus

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