Papular urticaria is usually referred to as insect bite dermatitis, with the course of the condition generally lasting about a week; if it extends beyond a week, it is considered chronic. The occurrence of papular urticaria is associated with bites from mosquitoes, mites, fleas, etc. In terms of treatment, topical applications such as calamine lotion or corticosteroid creams can be used, including mometasone furoate gel and hydrocortisone butyrate cream. For significant itching, oral antihistamines can also be taken, such as fexofenadine hydrochloride tablets or cetirizine hydrochloride oral solution, while avoiding washing with hot water.