Behcets disease is a rare, chronic disorder involving inflammation of blood vessels throughout the body. It is marked by recurrent oral and genital ulcers and eye inflammation.

The cause of Behcets disease is unknown. It is believed to be caused by an autoimmune reaction. This occurs when the body’s immune system attacks its own tissue by mistake. This autoimmune abnormality may be inherited. An environmental trigger, such as a specific virus or bacterium, may activate the disease in people susceptible to it.