Introduction to Thyroid Cancer

Hyperthyroidism

Hyperthyroidism is caused by an "overactive" thyroid with the overproduction of thyroid hormones resulting in an increased rate of body metabolism. The most common signs and symptoms of hyperthyroidism include nervousness, irritability, excessive sweating, hand tremors, and rapid heartbeat. The most common condition associated with hyperthyroidism is Graves' disease - an autoimmune disease in which the body produces antibodies that stimulate the thyroid gland to produce excessive amounts of thyroid hormones.