Behçet's syndrome is an inflammatory disease that affects the blood vessels. It is a disease of unknown origin, defined as autoimmune, chronic, and systemic, because it can affect any part of the body. The symptoms of Behcet's syndrome include: sores in the mouth, genitals and other parts of the skin; swelling of certain parts of the eye; pain, swelling and stiffness. More serious problems can include meningitis, blood clots, blindness and inflammation of the digestive system. Behcet's disease affects people between 20 and 40 years of age and usually reduces the quality of life of those affected. The treatment is designed to reduce inflammation and pain and prevent more serious problems.