Diabetes is a chronic metabolic disease with mainly elevated blood glucose. Long-term hyperglycemia can cause the following problems: First, acute complications such as diabetic ketoacidosis and hyperosmolar coma may occur after a short period of significant elevation of blood glucose, which can endanger patients’ lives and require active treatment. Second, long-term, chronic hyperglycemia can trigger large-vessel atherosclerosis, coronary heart disease, cerebral infarction, etc. Microvascular complications, such as diabetic nephropathy and diabetic retinopathy, can also occur. Long-term hyperglycemia can easily lead to diabetic peripheral nerve, vegetative nerve and cranial nerve lesions, and various symptoms such as numbness and pins and needles sensation in both lower limbs. Third, long-term hyperglycemia can also lead to surgical incisions or wounds that do not heal, poor body resistance, and easily combined with infections in the urinary system, respiratory system and other common parts.