There are many causes of edema, edema most likely to occur in the face and legs, edema of renal origin, such as some acute and chronic nephritis, nephrotic syndrome will lead to edema, and edema of hepatic origin, such as various kinds of hepatitis, liver cirrhosis, hypoproteinemia, and cardiac edema, such as heart failure, poor heart function, later will lead to edema. After finding edema, it is recommended to go to the hospital for further examination to clarify the cause, check the ultrasound of the heart, liver function and kidney function, and find the right treatment for the problem.