In the past year, I contacted a dozen of patients with allergic purpura, the oldest is 38 years old, the youngest is 5 years old, most of them are children and adolescents from 6-18 years old. I found that they all like to eat “spicy strips”, “spicy chips”, “spicy skewers” and other things before the onset of the disease, all have a history of eating these foods, the lighter the allergic purpura, the more serious can cause Gastrointestinal bleeding, allergic purpura nephritis. A typical case is a 30 male, usually healthy, like to drink wine, last year bought a box of spicy food, as the next drink, half a month later, the allergic purpura, and then developed into allergic purpura nephritis. Once the onset of the disease, it is important to hurry up the treatment, do not delay, the combination of Chinese and Western medicine treatment, most can be cured. Allergic purpura nephritis is an immune disease that occurs in children and adolescents. The onset of the disease is mostly allergic, triggered by the consumption of animal proteins such as milk, shrimp, fish, eggs, mutton, lobster, seafood, and unclean soy products and other foods. Remind parents that children are developing, must pay attention to dietary hygiene, no packaging, no date of manufacture of food firmly can not eat, and try to eat less or no allergy-prone food.