Diabetic edema can be divided into the following causes: 1. Whether diabetic edema is combined with diabetic nephropathy, poor kidney function, decreased glomerular filtration rate, and hypoproteinemia can cause double lower limb edema, eyelid edema, and in severe cases, generalized edema, pleural effusion, and peritoneal effusion may occur; 2. If diabetic patients are combined with coronary artery disease and heart failure, lower limb edema may occur; 3. If diabetes is combined with liver lesions and cirrhosis, lower limb edema may also appear, so it should be treated differently. If the edema is caused by diabetic nephropathy, we should monitor urine protein, check kidney function, give diuretics, improve hypoproteinemia, and improve anemia treatment; if diabetes is combined with coronary artery disease, we should first use diuretics, improve heart function, and treat the original disease of coronary artery disease; if diabetes is combined with liver problems and cirrhosis, we should mainly treat cirrhosis; in addition, some diabetic patients develop local edema because of playing In addition, some diabetic patients have local edema after taking insulin, so don’t pay too much attention to it.