Edema in the legs, usually occurs in the ankle or calf area, pressed by hand will be depressed, muscle rebound becomes slower, serious when touched will have a painful feeling. There are many reasons for leg edema: 1. Some jobs require long hours of standing, such as nurses, police officers, waiters, teachers, etc. These people are prone to leg edema. In addition, female patients often wear high heels, there will also be leg edema. 2, edema caused by kidney disease, such as acute nephritis, chronic nephritis, pyelonephritis, etc. 3, heart disease. If heart disease is severe with acute right heart failure, it can lead to edema caused by obstruction of venous return. 4, cirrhosis of the liver. 5, malnutrition. 6, venous thrombosis of the lower extremities. 7, women in late pregnancy can also have leg edema. There are many reasons that can lead to leg edema, so when these situations occur, it is recommended to go to the hospital as soon as possible for examination and symptomatic treatment, to reduce salt intake, not to drink too much water, to reduce activity and rest more, and to sleep at night with legs under pillows to elevate the legs, which is conducive to venous reflux.