Autoimmune hepatitis is a form of liver inflammation that occurs when the body's immune system attacks its own liver cells. Symptoms of autoimmune hepatitis can range from mild to severe, and can start out slowly or begin abruptly. They can also come and go over time. Among the most common symptoms of autoimmune hepatitis are a lack of appetite, excessive tiredness, and jaundice (or yellowing of the skin or whites of the eyes). Autoimmune hepatitis treatment consists mainly of using medication to suppress a person's overactive immune system. Prednisone and azathioprine are among the medicines that may be used to treat autoimmune hepatitis. Scientists do not yet know the exact cause or causes of autoimmune hepatitis.