Vitiligo is the primary, localized or generalized depigmentation of skin, which is caused by the decline and loss of tyrosinase system in melanocytes of skin and hair follicles. Skin lesions have no pigment, different sizes and shapes. White spots can appear all over the body, with clear boundaries, dark pigment in the boundary and white hair follicles. Traumatic vitiligo: Traumatic vitiligo is an acquired and generalized depigmentation of the skin and a common skin disease that affects the appearance. Diagnosis is easy, but treatment is difficult. Traditional Chinese medicine calls it vitiligo or white refutation. Vitiligo induced by trauma, surgery and scratching is called traumatic vitiligo. Deng Lihua, an expert from Shanghai True Love Vitiligo Hospital, has a telephone number of 02 1-62259 197. Segmental vitiligo is a localized melanotic skin disease. Teenagers have more diseases. Skin lesions are white spots with clear boundaries, round, oval or plastic. It can happen in any part of the body. Unconscious symptoms do not affect physical health, but affect aesthetics and bring mental pain to patients. A few small pieces of skin lesions can subside on their own, and mental factors, sun exposure, trauma, etc. can aggravate symptoms or induce illness. The etiology is unknown, including autoimmune theory, neurohumoral theory, melanocyte self-destruction theory and so on. People with extensive lesions can try photochemical therapy, that is, oral psoralen extended wave ultraviolet radiation. Various corticosteroid preparations can be used locally.