Allergic purpura is a relatively common vascular allergic disease. First of all, you need to prohibit the consumption of foods that may cause allergies, such as fish, shrimps, crabs, eggs and milk. Also avoid eating large amounts of fatty foods such as fatty meats, and do not overeat or smoke and drink at times. It is also advisable to limit foods that are highly stimulating, such as chillies and fennel. It is important to note that dietary modification is only one part of the treatment of the disease and cannot replace it completely. Your doctor will be able to advise you on the appropriate treatment plan for your condition and give you sound dietary advice.