There are often several reasons for easy thirst: 1. Drinking too little water. The amount of water intake is reduced, and the water distributed to all tissues of the body and the surface of the human skin is very little, which easily leads to thirst. 2. Weather factors. Dry weather leads to excessive evaporation of body water, so it is easy to appear dry mouth. 3, metabolic factors. The increase in urine sugar due to the rise in blood sugar causes osmotic diuresis and leads to loss of body water, which can also cause thirst. If you do not consider the problem of eating habits, you can go to the hospital to further improve the glucose tolerance test, autoantibody test, lip gland biopsy and other tests to clarify the cause of thirst.