Allergic purpura is a common vasculitis in children with capillary allergic inflammation as the pathological basis, manifesting as skin purpura, allergic rash, joint pain, abdominal pain, blood in stool and proteinuria. Allergens are complex and not easy to identify, and are prone to recurrence. Therefore, we need to do a good job in the daily preventive measures to avoid infringement. 1, avoid allergens First of all, you need to avoid contact with the causative agent, different children are not only allergic to the same substances, isolate these factors is an important way to prevent allergic purpura. 2, pay attention to hygiene Pay attention to the living environment, diet to be healthy and hygienic, wash your hands often, do not eat some unclean food, such as unwashed fruits and vegetables, allergic purpura itself is caused by allergies, eating unclean food is easy to aggravate the patient’s condition, in addition to room bacteria and dust mites too much, is also not conducive to everyone’s health. 3, strengthen the exercise usually do more physical exercise, help to enhance our physical fitness, improve the body’s ability to resist disease, help to resist various infections, which has a good effect on the prevention of allergic purpura. 4, control diet Many children with allergic purpura are caused by eating special food, such as eggs, milk, fish and shrimp. The actual foodstuffs that you need to eat during the acute period are only vegetarian, and you should not eat mushrooms, fungus, potatoes, etc. as much as possible. When the purpura is stable, gradually start to eat lean meat, eggs, milk, mushrooms, etc., to be gradually added. 5, easy recurrence time appropriate anti-allergy treatment The onset and recurrence of allergic purpura has obvious seasonality, most of them in September to December every year, also some children have onset or recurrence in spring or summer. Parents can use a little bit of anti-allergy medicine appropriately between the high incidence time according to the specific recurrence pattern of their children, which can effectively reduce the recurrence rate of purpura. 6, prevention and control of infection Infection is the most important factor causing purpura, so must enhance the physical fitness to prevent infection, once the infection is actively treated, if repeated cold, you can use immunomodulators appropriately. But must pay attention to, if the child usually rarely cold, not too much use of immune enhancing drugs.