The main reasons for dry lips are dry climate, lack of water, lack of B vitamins or vitamin A, oral or dental diseases, etc. The treatment methods should be chosen to deal with the causes: wearing a mask, hydration, vitamin supplementation, treatment of diseases and symptomatic treatment. 1. Dry climate: In the dry season, wearing a mask when going out can block the cold wind outside in order to maintain the temperature and humidity of the lips so as to avoid dehydration and dryness. 2. Lack of water: Drink more water to replenish enough water. Smoke less, drink less alcohol, and eat as little spicy food as possible. Spicy food can irritate lips and worsen dryness. 3. Supplementary vitamins: Eat more vitamin-rich fresh vegetables and fruits in your daily diet, such as soybean sprouts, greens, pears, oranges, apples, etc., and avoid partiality. You can take B vitamins or vitamin A, vitamin C, etc. as prescribed by your doctor. 4. Oral or dental diseases can also cause dry and cracked lips, and should actively target the disease itself for treatment. In the cause of the above treatment at the same time, you can give symptomatic treatment, such as moderate consumption of lipstick, lips before going to bed with honey or vegetable oil to moisturize the lips. Daily life should also pay attention to dry lips do not lick, lips peeling do not tear by hand (hot steam can be used to deal with), to ensure adequate sleep, relaxation, avoid strong ultraviolet radiation.