Special thirst has been drinking water may be caused by normal phenomenon, diabetes, uremia and other reasons. 1. Normal phenomenon: the body is in the dry season or high temperature environment, it will cause water loss, so there will be the phenomenon of always want to drink water, this situation is generally out of the hot environment, reduce sweating can be improved. 2. Diabetes: diabetes is a metabolic disease characterized by high blood sugar, long-term disease will cause dysfunction of the kidneys, blood vessels, heart, etc., in the clinical symptoms are mostly manifested in the phenomenon of polyphagia, polydipsia, polyuria, and so on, so that the patient will appear particularly thirsty, want to drink water. 3. Uremia: Uremia is a disease caused by frequent lesions of the hypothalamus, which will lead to impaired reabsorption of water in the renal tubules, and the clinical symptoms will be polyuria, and at the same time, it will cause dry mouth and thirst. It is recommended to go to the hospital for examination, the doctor will be based on clinical symptoms to give the appropriate judgment, clear causes of timely targeted treatment.