Allergic purpura is a relatively common vascular metaplasia. During the onset of the disease, patients are advised to eat a diet of less crumbly and easily digestible food, such as thick rice soup, thin rice and rotten noodles. Patients who are stable can eat fresh fruits or vegetables such as potatoes, tomatoes and cucumbers. When choosing foods, try to avoid foods that may cause allergies, choose foods that are low in salt, and take vitamin supplements. It is important to note that dietary modification is only one part of the treatment of the disease and cannot completely replace it. It is advisable to actively seek medical advice once you notice purpura on your skin in your daily life. Your doctor will be able to advise you on the appropriate treatment plan for your condition and give you sound dietary advice.