The most common cause of hyperthyroidism is

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The most common cause of hyperthyroidism is an autoimmune disorder called Graves' disease. The exact cause of Graves' disease is not clear, but a substance is produced that abnormally stimulates the thyroid gland. Other causes of hyperthyroidism include hyperplasia of the gland, benign and malignant tumors of the thyroid, pituitary gland disease, and metastatic tumors. Hyperplasia of the thyroid gland is one of the causes of hyperthyroidism; however, the most common cause of hyperthyroidism is an autoimmune disorder called Graves' disease. Benign and malignant tumors of the thyroid gland are one of the causes of hyperthyroidism; however, the most common cause of hyperthyroidism is an autoimmune disorder called Graves' disease. Pituitary gland disease is one of the causes of hyperthyroidism; however, the most common cause of hyperthyroidism is an autoimmune disorder called Graves' disease.

The Most Common Cause of Hyperthyroidism Is