Graves' disease is an autoimmune disease characterized by a metabolic imbalance resulting from overproduction of thyroid hormones (thyrotoxicosis).

It is named after Robert Graves, the 19th century Irish physician who first discovered the condition. In Graves' disease, the thyroid gland in the neck is diffusely enlarged and hyperactive, producing excessive thyroid hormones.

Graves' disease can have an effect on many parts of the body such as the nervous system, eyes, skin, hair/nails, lungs,...