The lips are always dry, cracked and peeling, which may be caused by insufficient drinking water, lack of vitamin B, lipitis and other reasons. 1. Insufficient drinking water: If the patient does not drink enough water, it will lead to insufficient water in the body, which will cause dry, cracked and peeling lips. 2. Lack of vitamin B: If the patient lacks vitamin B, the corners of the mouth will easily appear dry and cracked, and white secretion may also occur. 3. Lipitis: usually lipitis is an inflammatory disease that occurs in the lips, if the patient does not pay attention to lip care or have the bad habit of licking lips, lips are very easy to appear dry cracked and peeling. There are many reasons why lips are always dry and cracked and peeling, it is recommended that patients seek medical attention in a timely manner to clarify the cause of the disease, under the guidance of the doctor for formal treatment.