Graves' disease is an autoimmune disorder that affects the thyroid
gland, which produces hormones that control many of the body's functions.
Graves' disease causes the thyroid gland to produce too much thyroid hormone
(hyperthyroidism), which may make a person's heart pound and beat irregularly
and may cause nervousness, mood changes, weakness, and fatigue.
Signs and symptoms of Graves' disease include diarrhea, rapid heart
rate, inability to tolerate heat, and weight loss.
Graves' disease is the most common cause of hyperthyroidism. It
tends to run in families. And it affects women more often than men. It can
develop at any age. But most commonly it affects people between ages 30 and
E. Gregory Thompson, MD - Internal Medicine & David C.W. Lau, MD, PhD, FRCPC - Endocrinology