Most patients have frequent itching (69%); common skin lesions are scaly (90.2%), well-defined (82.8%), round or oval (80.5%); Common injury sites are back, buttocks, groin, face, respectively 23.6%, 23%, 21.8%, 21.3%; mainly 3 lesions or more (63.2%), the lesion area is moderate (73.6%) and the disease duration is less than 3 months is 71.8%.