There are two major categories of diabetic complications, as follows: 1. macrovascular complications: including cardiovascular complications of diabetes, angina pectoris, myocardial infarction; cerebrovascular complications of diabetes, cerebral infarction, cerebral hemorrhage, and even other brain tissue-related changes; and macrovascular complications are lower limb vascular complications, most likely to lead to diabetic foot disease; 2. microvascular complications of diabetes, these complications are related to the The more typical ones are diabetic retinopathy, long-term hyperglycemia will lead to abnormal blood vessels in the fundus of the eye, with small bleeding points, and in serious cases, a large bleeding in the fundus of the eye, a major bleeding can lead to blindness, and blindness treatment is poor; diabetic nephropathy, long-term poor blood sugar control can finally lead to uremia; diabetic neuropathy will lead to abnormal peripheral sensation, to temperature, pain, touch all Diabetic neuropathy can lead to abnormal peripheral sensation, abnormal sensation of temperature, pain and touch, and also to abnormal internal nerves, such as rapid heart rate, abnormal sweating, delayed gastric emptying and abnormal urination and defecation, all of which are common and frequent complications of diabetes.3. Diabetic neuropathy, the most common ones are diabetic peripheral neuropathy and diabetic autonomic neuropathy. In addition diabetic patients are prone to co-infection and other problems. Once these manifestations are present, blood sugar should be promptly controlled and a hospital visit should be made.