Modern medicine has no way to prevent allergic purpura, but you can reduce the chance of recurrence of allergic purpura and prevent recurrence by taking reasonable measures. 1, avoid contact with the causative agent, such as pollen, chemicals, paint, gasoline, dust mites, etc.; 2, allergic people should not keep pets, minimize contact with animal fur, especially children with clear allergens should pay more attention; 3, diet avoid spicy, spicy, stimulating food, avoid seafood, the early stage of the disease allergy cause is unknown do not eat food that has not been eaten in the past. The food should be hygienic, do not eat unclean fruits and vegetables and aquatic plants, in order to eliminate intestinal parasitic infections; 4, to strengthen exercise, enhance physical fitness, improve the body’s immunity to various infections, to avoid the triggers of allergic purpura; 5, timely increase and decrease clothing to prevent colds, room ventilation regularly to keep the air fresh; 6, if the annual to a certain season will occur allergic purpura, you can prior The Chinese medicine can have a certain preventive effect.