Diabetic patients’ feet are prone to edema, the main reasons are as follows: 1, the more common is diabetic patients with diabetic nephropathy, which is caused by diabetic patients with lower limbs, feet or facial edema is the most common cause of edema, because the kidney disease leads to the loss of a large number of proteins from the body in the urine, so it will lead to low-protein edema. 2, diabetic patients with high blood glucose levels, which may Diabetic patients with high blood glucose level may lead to lower extremity venous valve dysfunction and affect the lower extremity venous reflux, which can also lead to double lower extremity edema. 3, diabetic patients with heart disease, heart failure can also lead to double lower extremity edema.