The common causes of dry lips are wind and sun, dry climate, over-eating spicy and stimulating food, drinking too little water, lack of vitamins, etc. 1. First of all, you need to eat more fresh vegetables and fruits, avoid spicy, fried and stimulating food. The first thing you need to do is to eat more fresh vegetables and fruits, avoid spicy, fried and stimulating foods. Drink more water, chrysanthemum tea, honeysuckle tea, avoid drinking alcohol, carbonated drinks, coffee, etc. 2. Take oral vitamin B complex, vitamin C, multi-dimensional elements tablets and other drugs to supplement vitamins. You can also take Zhi Bai Di Huang Wan orally to nourish Yin and clear heat.