The causes of swollen legs and swollen face are as follows: 1. Edema caused by kidney disease. This kind of edema is characterized by the appearance of edema on the eyelids or face in the early stage, mostly in the morning, and later it will develop to the whole body. The distribution of edema has little to do with body position, and patients will be accompanied by increased blood pressure, proteinuria, hematuria, and tubular urine, etc. 2, edema caused by heart disease, right heart failure and pericardial effusion are common, the edema is characterized by first occurring in the lower part of the body, mostly starting from the ankle and gradually spreading upward, it is symmetrical, depressed edema, severe patients can appear pleural fluid, ascites and pericardial effusion. 3, malnutrition edema, this kind of edema is characterized by the early stage, mostly in the morning when the eyelids or face edema, later it will develop to the whole body. The edema is characterized by weight loss before the onset of the disease, starting from the ankle and gradually spreading upward, accompanied by a decrease in blood cholesterol level and a decrease in serum total protein and albumin level. 4. Premenstrual tension syndrome, which occurs 7-14 days before menstruation and disappears after the onset of menstruation, is cyclic and manifests as mild edema of the eyelids, ankles and hands, accompanied by breast swelling and pain. It is accompanied by swelling and pain in the breasts and a feeling of heaviness in the lower abdomen.