Diabetes drink more because the blood sugar in the body is too high, so the amount of urine must be increased so that the sugar is excreted from the urine, and it is because of the increased urine volume that too much water is lost in the body, so diabetic patients have to drink more water. If you deliberately drink less water, it will cause blood concentration and excessive blood sugar and nitrogenous waste in the blood cannot be eliminated, which will cause serious consequences. However, patients with renal insufficiency with edema should pay attention to the amount of water they drink.