Papular urticaria is a type of allergic disease, often related to contact with irritants or bites from mosquitoes and fleas. It typically appears as a red wheal on the skin surface, accompanied by severe itching. Scratching can lead to the formation of clear, small blisters at the center or top of the wheal. Once this occurs, it is advisable to expose clothing, bed sheets, and quilt covers to sunlight for disinfection. Avoid keeping pets at home and visiting areas with abundant flowers and trees. Conventional antiallergic medications generally can cure papular urticaria in a short period. If blisters appear, try not to scratch them open to prevent bacterial infections.