Dry mouth and cracked mouth may be caused by dehydration or lipitis, according to the situation can be supplemented with water or local application of antibiotic ointment and other drugs for treatment. 1. Lack of water. When the diet is too spicy and stimulating, drinking too little water may cause dry and cracked lips, which suggests that the body is dehydrated and needs to be supplemented with water in a timely manner. 2. Lip inflammation. When the lips are subjected to external long-term stimulation or infection, low immunity and other factors, lipitis, need to reduce the external stimulation of the lips, local application of antibiotic ointment to prevent and control secondary infection of the lips, while maintaining a relaxed mood, regular exercise to improve the body’s immunity. The specific need to check the cause of dry mouth cracked mouth to the hospital, under the guidance of the physician targeted medication.