Dry and cracked lips are mainly caused by vitamin B2 or vitamin A deficiency in human body, but vitamin C deficiency can also cause lips peeling. Some other dry and cracked lips are caused by bad habits such as lip licking and lip biting. It is recommended that patients drink more water and eat more fresh vegetables and fruits to replenish vitamins, which can prevent dry and cracked lips, and if necessary, they can be treated with appropriate vitamins or multivitamins. When dry and cracked lips and peeling caused by lip infection, it is recommended that you can choose some ointments with moistening effect to apply, such as lip balm, vitamin E cream, furnace glycolic lotion and so on. However, it should be noted that some topical medications have hormonal components, so it is recommended that patients choose them after consulting their doctors. Patients with long-term dry and cracked lips should pay special attention to lip moisturizing and sun protection, and if it is more serious, they can use Cibachrome and other mouthwash to apply wet compresses appropriately, and when the control is not good and hard nodules on the lips appear, they should consult a doctor promptly.