Allergic purpura is a kind of allergic disease that occurs when the small arteries and capillaries of the body are allergic to certain substances, and is related to the immune disorder of the body. The main manifestations are skin purpura and mucosal bleeding, gastrointestinal symptoms, joint swelling and pain and urinary symptoms. It occurs in children aged 3 to 10 years. The causes include infections (often with a history of upper respiratory tract infections 1-3 weeks before the onset of the disease), food allergies (such as eggs, fish, shrimp, etc.), drug allergies, allergies caused by plant pollen, animal feathers, paint, insect bites, cold stimuli, vaccinations, etc., which cause an autoimmune reaction in the body, resulting in inflammatory changes in the capillaries. However, the cause of allergy is often difficult to determine. Avoiding exposure to allergens can only avoid common possible allergens. Common possible allergens can be found through laboratory tests, and observation in life is also important. The main clinical manifestations are: 1. skin purpura 2. gastrointestinal symptoms 3. joint symptoms 4. urinary symptoms About half of the children with purpura are complicated by purpura nephritis within 2 weeks-4 weeks after the onset of purpura, or it may appear only after the purpura subsides. The severity of the kidney disease determines the prognosis of the child. In fact, it has been analyzed that 80% of the patients are combined with renal damage as confirmed by kidney puncture, only the severity of the manifestation varies. Purpura kidney is a very difficult disease. Generally speaking, it takes a long time to observe the treatment. The patient is susceptible to environmental changes, such as cold weather, fatigue, mood swings, cold, alcohol, allergy-causing food, etc. These conditions often lead to aggravation and recurrence of the disease. We often encounter children with recurrent illnesses during the treatment process. Drugs can improve various symptoms quickly, but they cannot effectively prevent the occurrence of serious complications and the recurrence of the disease and kidney damage. It is important to be prepared for this. The disease generally has a good prognosis as long as there are no serious gastrointestinal and brain complications and no complications of purpura kidney, but it is easy to recur. Patients with allergic purpura are highly susceptible to aggravation by the external environment, so the following should be done in life: ① Remove possible allergens ② Pay attention to rest and avoid strain. ③ Pay attention to keep warm and prevent cold. ④Avoid mood swings and prevent insect bites. ⑤ Avoid taking drugs that may cause allergies. ⑥ Pay attention to your diet and abstain from irritating foods such as raw onion, raw garlic, chili, alcohol; foods high in animal protein such as meat, seafood, eggs, milk; convenience foods such as beverages and snacks. Avoid eating spicy foods. Pay attention to avoid eating rough, hard and mechanically stimulating food to the gastrointestinal tract. Children with abdominal pain should rest in bed and observe whether there is abdominal colic, vomiting and bloody stools. Pay attention to the stool properties and take stool specimens. The abdominal pain is forbidden to apply heat to the abdomen to prevent aggravation of intestinal bleeding. In recent years, the incidence of allergic purpura has increased significantly, mainly due to environmental pollution, children’s high protein diet too much, the decline of the body quality leading to immune function, too much use of small food and so on. Many patients have been asking, how to prevent the recurrence of allergic purpura? Many children with allergic purpura develop due to eating special foods, such as eggs, milk, snacks, fish and shrimp, etc. And I have emphasized many times that nine out of ten children with allergic purpura are hot body. Therefore, if your child suffers from allergic purpura, you must strictly control your child’s diet, do not eat or eat less food that is easy on fire. The actual fact is that you will be able to get a lot more than just a few of the most effective and most effective products. After the purpura is stabilized, gradually start to eat lean meat, eggs, milk, mushrooms, etc., but be sure to add one kind of one kind gradually. For the issue of mutton, chili, seafood, do not eat for a period of time. As for a period of time exactly how long, it depends on the child’s physique comprehensive judgment. Because these things are very dangerous for purpura, since they are dangerous, it should be more reasonable to stay away from some time. Let’s follow 2-3 years first. In the clinic generally requires the acute period of allergic purpura children can not eat fish, milk, eggs, shrimp and other foods, it is best to first eat green vegetables, radish, cabbage, rice, steamed buns, thin rice and other non-allergic food, with the control of the disease, gradually add pork, potatoes, eggs and other foods, if the disease is completely controlled, then only start to add seafood and other foods.