Children with papular urticaria should be careful to avoid allergenic foods. Papular urticaria, also known as insect bite dermatitis, is an allergic skin disease that occurs after insect bites and is most common in infants and children. It mostly manifests itself as aggregated or scattered windswept pimples accompanied by intense itching. In terms of diet, attention should be paid to avoiding foods that have clearly caused allergies, and daily attention should be paid to a healthy diet with balanced nutrition. And, once the papular urticaria should immediately go to the hospital for active symptomatic and anti-allergic treatment. At the same time, it is necessary to pay attention to avoid children scratching to prevent further infection.