Lip peeling may be a lack of vitamin B2, vitamin A, etc., may also be caused by lipitis, need to be specifically analyzed. 1. Vitamin B2: Vitamin B2 can promote skin metabolism, skin and mucous membranes have a protective effect, when the body lacks vitamin B2, it will lead to lipitis, early lip redness and swelling, deepening of longitudinal fissures, followed by lip mucous membrane dryness, cracking and hyperpigmentation, mainly in the lower lip. 2. Vitamin A: also called retinol, the body’s cell function has the role of maintenance, when the body lacks vitamin A, will lead to the beginning of the skin only feel dry skin, easy to flake, itchy. 3. Lipitis: the cause is unknown, mostly associated with a variety of chronic long-term persistent stimuli, such as dry climate, wind and mechanical, chemical, temperature, drugs and other factors, or lip licking, lip biting and other bad habits. It may also be related to anxiety and other mental factors. Manifestations include dry, burning or painful lips, lip swelling, congestion, flaking of the red part of the lips, chapping, and oozing and crusting on the surface. Causes of peeling lips are more reasons, not necessarily due to vitamin deficiency, it is recommended to consult a doctor in time for examination and treatment after clarification of the cause.