Itchy lips with itchy edges can be caused by a variety of reasons, commonly lip infections, allergies, herpes, etc. Patients are advised to visit the dermatology department as soon as possible to clarify the cause and then treat it symptomatically. 1, when lip infection causes itchy lips and their edges, it is recommended that you can choose some ointments with moistening effect to apply, such as lip balm, vitamin E cream, furnace glycolic lotion, etc.. However, it should be noted that some of the topical drugs have hormonal ingredients, so it is recommended that patients choose them after consulting a doctor. 2, allergy: patients can pay attention to the exposure to substances in their lives, or perform allergen determination to clarify the substances to which they are allergic, after which avoid allergic substances, stay away from chemicals, seafood, etc., and if necessary, take anti-allergy drugs, such as chlorhexidine, under the guidance of a doctor. 3, herpes: herpes infection can cause itchy lips and itchy lips edge, in the early stage of the disease may not have symptoms of skin lesions, it is recommended that patients go to the dermatology department for regular antiviral treatment, generally will be oral or intravenous use of antiviral drugs (such as acyclovir), while the local use of antiviral cream, a full course of antiviral treatment. In addition to paying attention to symptomatic treatment when itchy lips edge itch, local skin care is also important, and patients are advised not to scratch with their hands or bite with their mouths to stimulate the skin of the lips, so as not to aggravate the disease.