What is graves disease?

Grave's Disease: Graves' disease is an immune system disorder that results in the overproduction of thyroid hormones (hyperthyroidism). While a number of disorders may result in hyperthyroidism, graves' disease is the most common cause. It casuses the classic look of exophthalmos (bulging eye).

Over active thyroid: Graves' disease is an autoimmune disorder, meaning it is caused by antibodies against the thyroid. These antibodies "trick" the thyroid into making more thyroid hormone than it is supposed to. That leads to symptoms such as excess sweating, palpitations, tremors, frequent bowel movements and weight loss.