Diabetic complications are as follows: 1. Microvascular complications: Mostly involving the kidneys, eyes, and heart muscle. Diabetic nephropathy is called diabetic nephropathy, and the end stage of diabetic nephropathy is uremia, which is a serious disabling and even fatal disease. Involvement of the eyes is called diabetic retinopathy, which is one of the main causes of blindness in ophthalmology patients. 2, macrovascular complications: the prevalence is higher and can involve all large blood vessels in the body, such as involvement of the cerebral arteries is called ischemic, hemorrhagic cerebrovascular disease, commonly known as cerebral thrombosis or cerebral hemorrhage. The involvement of coronary arteries causes coronary heart disease, the involvement of renal arteries causes renal atherosclerosis, and the involvement of lower limb arteries is called diabetic lower limb arterial occlusive disease, which may result in serious amputation. 3. Diabetic central nervous system complications: the most common peripheral neuropathy, characterized by bilateral symmetrical onset, vegetative neuropathy involving the skin, sweat glands, urinary system, genital system, gastrointestinal, such as the involvement of the gastrointestinal called Diabetic gastroparesis may present with diarrhea and constipation. Involvement of the genitourinary system can have abnormal urination or sexual dysfunction, etc.; 4, diabetic foot: diabetic foot is a comprehensive performance based on the above complications, such as combined neuropathy, macrovascular, microvascular lesions, such as foot combined with rupture, infection, chronic changes in the foot, serious possible infection or necrotic amputation, etc.; 5, other atypical complications.