Facial cracks often occur in winter, when the weather is cold and dry, causing cracks on the face due to lack of water. It is common in small children, and some workers and farmers who work outdoors may also suffer from facial fissures over time because they do not take good protective measures. Face crack is similar to frostbite, frostbite, cleft lip, cleft nose and other symptoms, clinical differential diagnosis methods are as follows: 1, frostbite Frostbite is a cold-induced terminal limited inflammatory skin disease, is a common winter disease, to the exposed parts; appear congestive edema erythema, when the temperature is high skin itching as a characteristic, serious cases may appear affected skin erosion, ulcers and other phenomena. The disease has a long course and recurs in winter, which is not easy to cure. For some young women, it not only affects the beauty of their hands, but also brings great inconvenience to their lives. In terms of treatment, there are many ways to treat it, but it is rarely curable, so it is often tricky. 2. Frostbite is a limited inflammatory damage caused by cold. Frostbite is a common disease in winter, especially in children, women and the elderly. Once frostbite occurs, it is often difficult to heal quickly during the cold season and will only gradually heal when the weather turns warmer. 3, cleft lip Cleft lip is a common congenital malformation of the oral and maxillofacial region, with an incidence of about 1:1000. normal fetuses, after the fifth week, begin to gradually fuse with each other from some embryonic protrusions to form the face, and if they do not develop normally, deformities can occur, including cleft lip. 4.Nasal fissure The nasal fissure is a deformity formed when the middle or lateral nasal protrusions and the two bulbous protrusions differentiated from the lower end of the face during the 1st-7th weeks of embryonic development do not fuse with each other in the midline in the normal process. Common diseases such as congenital malformation of the external nose and rosacea can cause nasal fissures.