Anaphylactic purpura requires attention: detachment from allergens, selection of appropriate drugs for treatment according to the specific type of anaphylactic purpura. 1. As the name suggests, allergic purpura is a group of allergic diseases caused by allergens. Finding and detaching from allergens is the first principle of treating allergic purpura, otherwise continuous exposure to allergens will only lead to continuous aggravation of the condition. 2. Allergic purpura is divided into simple allergic purpura and compound allergic purpura, and compound allergic purpura is divided into gastrointestinal, renal, and arthritic types. Among them, the renal type allergic purpura hormone (prednisone) treatment is often ineffective, need to apply the immune agents such as cyclophosphamide, while the other types of allergic purpura hormone treatment is often effective. Specific diagnosis and treatment should be carried out under the guidance of a physician.