The swollen feet caused by diabetic patients should be considered firstly whether it causes diabetic nephropathy, secondly diabetic peripheral neuropathy and thirdly diabetic vasculopathy should be considered. First, diabetic nephropathy, these aspects need to be checked are kidney function, urine routine, urine microalbumin, 24-hour urine protein quantification. If the kidney function is abnormal, the protein in the urine shows (+) number, and the 24h urine protein quantification exceeds 300mg, then diabetic nephropathy is considered, and it is necessary to lower blood sugar and kidney preservation treatment. Second, diabetic peripheral neuropathy, in this case need to identify whether the combination of numbness, pain, chills, you can do electromyography to see whether there is neuropathy, treatment will need to nerve nutrition. Third, vascular lesions, diabetic patients are generally metabolic disorders, which can cause vascular sclerosis, and in severe cases may cause occlusion of the lower extremity vessels, which may also cause edema and swelling of the feet, and requires the use of vascular ultrasound to see if there is vascular lesions or venous thrombosis. The specific treatment will vary from person to person.