Just finished drinking water lips immediately dry again is usually due to insufficient intake of water, diabetes or dry syndrome, etc., such as for the disease, once found need to promptly seek medical treatment. Normal adults should drink about 2,000ml of water a day, if the daily intake of water is insufficient, there will be just finished drinking water or dry mouth. Diabetic patients have the symptom of excessive drinking, so their mouths will be dry all the time; in addition, dry syndrome will also have dry eyes, itchy eyes, dry mouth and other symptoms, which will lead to a dry mouth all the time. In daily life, you must keep drinking normal and sufficient amount of water, eat more vegetables and fruits, and try to avoid eating greasy or spicy stimulating food. If it is difficult to relieve the dry mouth all the time, or other discomforts occur, you should consult a doctor in time.