The Dermatology Department of Nan 'an District People's Hospital in Chongqing is a specialized dermatology hospital approved by the national health authorities and established in strict accordance with the relevant diagnosis and treatment norms. The hospital strictly abides by the national 5A medical service standard, and has now formed a situation of "big specialty and small synthesis" featuring vitiligo, psoriasis, acne and alopecia and focusing on dozens of skin diseases. Chongqing vitiligo research institute, psoriasis research institute and acne alopecia treatment center were established, and efforts were made to create specialist characteristics.