Lips are always peeling, may be caused by dry weather, may also be caused by allergic lipitis, lack of vitamin B2 and other pathological factors. 1. Dry weather: in dry weather, lips often blow to the dry cold wind, if you drink less water, usually do not pay attention to the care of the lip skin, do not wipe the lip balm, it is very easy to cause lips peeling. You can apply more lip balm and drink more water to keep your lips moist. 2. Allergic lipitis: the use of inappropriate lip balm may trigger allergic lipitis. Inflammation releases prostaglandins, leukotrienes, thromboxanes and other inflammatory mediators that stimulate the local lips, which can trigger itchy, peeling lips. You can first go to the hospital to do allergen detection test, after the detection of allergens, pay attention to stay away from allergens. 3. Lack of vitamin B2: Vitamin B2 is a water-soluble, acid-containing vitamin, which is involved in the body’s oxidative defense system, can maintain the normal components of the human mucous membrane. If vitamin B2 is deficient, it will cause damage to the mucous membrane, resulting in peeling lips. If the patient appears lips always peeling, it is recommended that the patient go to the hospital in time to improve the examination, clarify the cause of the disease, and follow the doctor’s instructions for treatment.