Papular urticaria is also known as urticarial lichen planus and infantile lichen planus. It is a common allergic skin disease in infants and children, but adults can also suffer from it. Often several people in the same family develop it at the same time. It occurs more often in spring and autumn. The disease is a disease named after its symptomatic features, and in fact the disease is known as insect bite dermatitis. The clinical features are scattered, slightly hard papules with small blisters on the tip. They are surrounded by a fusiform redness and are consciously itchy. Papular urticaria, may be associated with insect bites, intestinal parasites and certain foods. Patients are often allergic, mostly involving children and adolescents, with easy onset in spring and autumn. It usually occurs on the waist, back, buttocks and lower legs. The lesions are red, fusiform or rounded papules, often with central blisters and clusters. Itchy, repeated scratching can lead to secondary infection. The rash usually fades after 1 week, but can recur if the cause is not removed. How to treat papular urticaria? 1.Remove all kinds of causative factors: such as not keeping small animals at home, not placing flowers and plants, less stay in the area shared by pets and people; patients avoid scalding, moderate cleaning, keep the lesions dry and not wet, regular scalding and exposure to the patient’s clothes and bedding; light diet, avoid eating seafood and other high-protein food during the attack period. 2, drug treatment: local topical drugs to glucocorticoids, oral drugs to antihistamines as the main, with infection can be added antibiotics.