High blood sugar can drink water in moderation, but it is not recommended to drink a lot of water suddenly. Patients with high blood sugar can drink more water, which can promote the body’s metabolism, which is good for the body. Drinking water will also not affect blood sugar, will not lead to blood sugar increase, so high blood sugar can drink more water in moderation. High blood sugar appears diabetic ketoacidosis or diabetic hyperglycemic hyperosmolar state, more to drink more water, but also intravenous rehydration to correct the blood volume insufficiency and hyperosmolar state. High blood sugar can drink water, but in moderation, can not drink a lot of water, to avoid leading to uncomfortable symptoms, such as the emergence of water intoxication, abdominal distension and other symptoms. If high blood sugar, diabetic patients in the combination of diabetic nephropathy, edema or renal function abnormalities, it is not recommended to drink a lot of water at this time, so as not to aggravate edema and increase the burden on the kidneys, is not conducive to the recovery of the condition. High blood sugar should go to the hospital, under the guidance of the doctor to choose reasonable drug therapy, diet control, exercise management.