Diabetic patients drink alcohol, there are mainly the following hazards: 1, cause elevated blood sugar, long-term alcohol consumption will cause a serious increase in blood sugar, the emergence of diabetes-related complications, such as diabetic cardiovascular disease, the emergence of atherosclerosis, which in turn causes hypertensive disease. Long-term hypertension will cause hyperinsulinemia, which in turn will affect blood glucose control and cause further elevation of blood glucose, thus forming a vicious circle.2. cause a significant increase in the incidence of cerebrovascular disease, cerebral infarction, cerebral artery blood supply deficiency, and even cerebral hemorrhage, which will cause early diabetic complications.3. cause worsening of diabetic peripheral neuropathy, resulting in diabetic foot, diabetic retinopathy, etc. Diabetic retinopathy and other complications of diabetes.