Insulin injection allergy, if the allergic reaction is mild, it can be cured by itself, but the more severe allergy is usually difficult to be cured by itself. Allergic reaction may occur after insulin injection, if the allergic reaction is mild, such as localized rash and itching at the injection site, it may be cured by itself, if the allergic reaction persists without relief, then it is necessary to go to the hospital and take medication to treat the allergic reaction. If severe allergic reaction occurs, such as generalized allergy, anaphylactic shock, etc., which cannot be cured by itself, it is recommended to go to the hospital immediately for treatment under the guidance of the doctor. Patients who experience allergic reactions after insulin injection are advised to seek medical attention promptly.