Red itchy allergy to plaster, if the symptoms are not serious, usually can be self-healing; if the condition is serious, it can not be self-healing. Therefore, it can not be generalized. 1. Can be self-healing: paste allergy red itch, if the symptoms are mild, only local erythema, itching, no pimples, papules, etc., generally stop using allergy-inducing ointment, pay attention to hygiene, avoid scratching, most of the cases can be self-healing. 2. Can not be self-healing: paste ointment allergy red itch, if the symptoms are more serious or their own body is allergic, local erythema, papules, papules, oozing, vesicles, and so on, and even in the parts of the ointment did not use erythema, papules, etc., then it may not be able to self-healing. At this time, you need to immediately stop the topical cream, and promptly seek medical attention, under the guidance of the doctor to use glycerine lotion, glucocorticoid ointment, etc., while oral antihistamine medication and other treatments, such as chlorpheniramine maleate, cetirizine, etc.. It is recommended that patients allergic to plasters go to the hospital in time, after a clear diagnosis under the guidance of a professional doctor to standardize the use of drug therapy.