Dry mouth in spring may be caused by physiological factors, but also due to diabetes, dry syndrome, hyperthyroidism and other factors. 1. Physiological factors: spring temperatures gradually rise, water evaporation is too fast, aggravating the phenomenon of dry mouth and tongue. It may also be due to eating too much salt or too much dry food, or not timely replenishment of water after exercise, will appear dry mouth performance. It is recommended to drink more water to replenish the body’s lack of water. 2. Diabetes mellitus: because diabetic patients in the state of continuous rise in blood sugar, there will be dry mouth and tongue, drink more, urinate more and other conditions. 3. Dry Syndrome: If the patient suffers from dry syndrome, the saliva secretion is abnormal and will show the symptoms of dry mouth and tongue. The patient will also have dry eyes, and some patients may also have low-grade fever and fatigue. 4. Hyperthyroidism: Hyperthyroidism in the process of development, will lead to the patient because the body metabolism accelerated as well as increased oxygen consumption and the symptoms of dry mouth and tongue. In addition to the above reasons can lead to dry mouth and tongue, there are many other reasons, it is recommended to consult a doctor in a timely manner to find the exact cause of dry mouth and tongue for targeted treatment.