1.Mouth ulcers occur almost 100% of the time. The ulcers are distributed on the tongue, gums, the inside of the upper and lower lips, oral mucosa or throat, and are prone to recurrent attacks. 2. The incidence of eye symptoms is 70% in men. 3.Mouth ulcers occur almost 100%. The ulcers are distributed on the tongue, gums, the inner side of the upper and lower lips, oral mucosa or throat, and are prone to recurrence. 4.Ocular symptoms occur in 70%, with higher and heavier incidence in males, such as keratitis, corneal ulcer, sclerositis, chorioretinitis, typically often accompanied by iridocyclitis or even blindness. 5, external genital ulcers, the incidence of 66.8%, genital, skin, mucous membrane can occur ulcers, large and deep, pain, slow healing. 6, skin damage incidence of 76%. Impetigo, folliculitis, boils and erythema can occur. 7. Arthralgia and heart, lung, kidney and intestinal tract are involved. Blood sedimentation is increased and blood cells are mildly elevated. The disease occurs in young people in their twenties and thirties, and treatment is often missed because they are too shy to seek medical attention. If you have suspicious symptoms, you should avoid spicy and allergenic foods and seafood. Hormone and immunosuppressant treatment is effective, but should be used under the guidance of a specialist to reduce side effects.