Diabetes can cause dizziness and nausea. Typical symptoms of diabetes are excessive drinking, excessive eating, excessive urination and weight loss. When patients experience dizziness and nausea, the first thing they need to consider is that it is caused by low blood glucose or complications of diabetes. Diabetic patients with excessive dietary control, insufficient nutritional energy intake of food, or taking too much hypoglycemic drugs may have low blood glucose, which will show dizziness, nausea, pallor and other symptoms, through blood glucose monitoring can determine whether there is hypoglycemia. Secondly, acute complications of diabetes such as diabetic ketoacidosis, hyperglycemic hyperosmolar state may show clinical manifestations of dizziness, nausea, accompanied by vomiting, or even coma and other symptoms, and in serious cases, even endangering the patient’s life. Therefore, when diabetic patients appear dizziness, nausea symptoms, be alert to whether there is hypoglycemia or acute complications and other conditions, the need to promptly seek medical attention to monitor blood glucose, under the guidance of the doctor to identify the cause of the disease.