Itchy lips may be caused by lip infection. If it is lip infection, it may generally be formed by contact allergy or other allergic factors, which is an inflammatory allergic reaction of the lips. After this kind of allergic reaction occurs, some people may have a long period of time that does not heal, some lip infections may appear localized flushing, and after a longer period of time may appear lip cracking, or different degrees of peeling symptoms. So for the itching of the lips and lip infection, you need to use some topical medications, especially lip moisturizers, such as vitamin E cream or urea cream topical application.