There are many reasons for dry, cracked and peeled corners of the mouth, such as bad habits, lack of vitamins and lipitis. 1. Bad habits: patients who have bad habits, such as like to tear off the dry skin on the lips with their hands, licking the lips with the tongue on a regular basis, etc., may lead to the phenomenon of dry cracked skin at the corners of the mouth. 2. Lack of vitamins: the lack of vitamins in the patient’s body can also cause the corners of the mouth dry cracked skin, especially the lack of vitamin B, will not only cause the corners of the mouth dry cracked skin, and even cause the mucous membrane system deficiencies, such as mouth ulcers. 3. Lipitis: Lipitis can also lead to cracking and peeling at the corners of the mouth, which may be related to weather factors, allergies and other factors, the disease will not only lead to cracking and peeling at the corners of the mouth, but also may be accompanied by dryness, oozing and other phenomena. There are many reasons why the corners of the mouth are dry and cracked and peeling, and it is recommended to go to the hospital in time to complete the examination after the symptoms appear, and to give standardized treatment after a clear diagnosis, so as not to ignore the symptoms and take them lightly, and to use the medication in accordance with the doctor’s instructions.