Graves Disease :
Graves' disease, also known as hyperthyroidism, is an autoimmune disorder that affects the thyroid gland. It may be caused by genetics, stress, infection and pregnancy, rheumatoid arthritis, lupus, type 1 diabetes, celiac disease, and vitiligo. It can affect the heart, skeletal muscle, eyes, skin, bones, and liver. Symptoms of hyperthyroidism are rapid heartbeat, feeling nervous, weight loss, increased appetite, diarrhea, thin and warm skin, frequent bowel movements, moist skin, intolerance to heat, excessive sweating, difficulty sleeping, insomnia, enlarged thyroid gland, change in the hair texture, hair loss, and muscle weakness. It may also cause symptoms related to the eye, like gritty, irritated eyes, swelling of tissues around the eyes, bulging eyes, light sensitivity, pressure and pain in the eyes, and blurred and double vision. Diagnosis can be made by asking for medical and family history of thyroid disease and by performing thyroid blood tests, thyroid antibody blood tests, thyroid uptake and scan, and Doppler blood flow measurement.