”Papular urticaria” often occurs in the summer and autumn, mostly in children, and is self-induced itching. It is mostly due to allergic reactions caused by the bites of certain arthropods such as mosquitoes, fleas, mites, midges, bedbugs, etc. It is also caused by digestive disorders and allergic reactions to certain foods. The skin damage is usually found on exposed areas such as the face, neck, and limbs, and is manifested as a 1 to 2 cm large reddish puffy papule, slightly fusiform, with a small blister in the center, which can sometimes evolve into a large blister. The rash usually fades after 3 to 7 days, leaving pigmentation, and can continue to occur and gradually heal after several weeks. At the same time, it should be reminded that papular urticaria should be distinguished from chickenpox, which occurs on the trunk, proximal extremities and the head and face, and the oral mucosa is often involved, and the damage is not seen in the form of a wind-swept rash, and there is no tension blistering. It is not itchy or lightly itchy, but patients often have systemic symptoms such as low fever. Treatment is generally internal antihistamines, external application of glyburide lotion or corticosteroid cream; also can be used to wash externally with a decoction of Chinese herbs such as mugwort, cypress, bitter ginseng, serpent’s bed, ground bark and wind. In case of secondary infection, 0.5% neomycin ointment can be applied externally, and if necessary, anti-infective drugs can be added. In the summer and autumn season, to stay away from papular urticaria, you need to pay attention to hygiene and reasonable diet. You should pay attention to the environment, room and personal hygiene, to eliminate the breeding of insects that cause this disease, and try to wear long pants when playing and walking in the park to avoid mosquito bites. Also, avoid eating foods that can cause allergies. The high season of this disease is approaching, I hope parents and friends pay attention to prevention.