Diabetic patients always want to sleep for a variety of reasons, consider acute complications of diabetes, cerebrovascular disease and other causes. 1. Acute complications of diabetes (1) diabetic ketoacidosis: diabetic patients with elevated blood glucose levels, lipolysis is enhanced, the formation of a large number of ketone bodies, ketone bodies in the body of a large number of accumulation, nausea and vomiting, abdominal pain and diarrhea and other symptoms, severe patients will be drowsy, or even coma. (2) hyperosmolar hyperglycemia syndrome: diabetic patients for various reasons, so that the blood glucose significantly increased, can cause plasma osmolality increased, thus causing drowsiness symptoms. 2. Cerebrovascular disease: diabetic patients, the increase of blood glucose is easy to induce acute cerebrovascular disease, such as cerebral infarction, cerebral hemorrhage, and the symptoms of drowsiness may appear. When diabetic patients have symptoms of drowsiness, they should consult a doctor in time to clarify the cause of the disease and get early treatment.