Pityriasis rosea is a kind of erythematous scaly skin disease, clinically often associated with allergies, infections and other factors, the rash is often manifested as oblong or irregular shape, along the skin pattern, symmetrical distribution, trunk mainly, rarely spread to the face, clinically accompanied by mild itching or basically no itching. The disease usually resolves spontaneously in 6-8 weeks, but some patients have a prolonged course, even up to 1 month or several months. Antihistamines can be taken orally, together with compound glycopyrrolate tablets and topical application of Eudragit and zinc oxide ointment, while avoiding spicy, tobacco and alcohol stimulation is recommended to shorten the course of the disease.