Cracked tongue with dry mouth may be hereditary, drinking too little water, but also may be caused by lingual inflammation, dry syndrome and other diseases. 1. Drinking too little water:If the patient has too little water intake in daily life, the patient leads to a dry tongue and dry mouth. If the patient himself exists grooved tongue, it will aggravate the symptoms of dry mouth discomfort. 2. Tongue inflammation:Tongue inflammation has many causes, and is considered to be due to a variety of factors such as malnutrition, vitamin deficiency, endocrine disorders and so on. Patients will have shallower fissures, dry mouth, small spots and other phenomena, so patients will have tongue fissures and dry mouth. 3. Dry syndrome:The cause of dry syndrome is still unclear, mostly due to infection, endocrine and other factors. The main symptoms of patients are dry mouth, dry and cracked tongue, tongue pain and so on, there will be tongue cracks, dry mouth phenomenon. When patients have symptoms of cracked tongue and dry mouth, it is recommended to drink more water and pay attention to oral hygiene. If the disease causes cracked tongue and dry mouth, the patient should seek medical treatment in time to identify the cause of the disease and follow the doctor’s instructions for treatment.