Itchy skin after eating spicy food is also called food allergy, which is a relatively common allergic phenomenon. Food allergy is also referred to as taking a certain kind of food and induced a perverse reaction, typically characterized by skin itching and rash after eating, the more common allergenic foods are fish, shrimp, eggs, as well as some spicy and stimulating foods. For some allergic body, it is necessary to improve the allergen test to clarify the allergen. Food allergies can be handled in different ways depending on the severity of the allergy. For mild food allergy, the main focus is usually to stop using the food and avoid taking the food again. For moderate food allergy, some anti-allergy drugs can be taken appropriately, such as loratadine tablets, chlorpheniramine maleate tablets and so on. For people with more severe allergy symptoms, intravenous medications, including glucocorticosteroids (dexamethasone), calcium preparations (calcium gluconate), etc., should be given immediately.