Swollen feet in diabetic patients may be caused by diabetic complications, such as diabetic nephropathy, diabetic peripheral vascular disease, and may also be caused by drugs, it is recommended to consult a doctor in time. Swollen feet in diabetic patients can be caused by diabetic nephropathy, diabetic nephropathy when the patient has a large amount of urinary protein, resulting in hypoproteinemia, which causes swelling of the feet, most of the depressed edema. In addition to diabetic peripheral vascular disease caused by circulatory disorders can also lead to edema. Diabetic patients with hypertension, heart disease, etc., the application of nifedipine and other calcium antagonist drugs, may cause edema as a side effect, then need to adjust the dosage of the drug or replace other drugs. If the patient’s edema is accompanied by redness and warmth of the skin, accompanied by pain, consider edema caused by infection. Diabetic patients with edema need to consult the endocrinology department of the hospital, improve the liver and kidney function, urine routine, etc., and if necessary, carry out the lower limb vascular ultrasound and other corresponding examinations, to clarify the cause of the disease and then carry out the treatment.