Leg edema does not go away, may be gestational edema, may also be a symptom of certain diseases, such as nephritis, cirrhosis, malnutrition, etc., should be timely consultation to identify the cause. 1. gestational edema: most pregnant women during pregnancy, as the uterus grows, the inferior vena cava can be compressed, resulting in obstruction of venous return and the symptoms of leg edema do not go away, usually need to elevate the lower limbs. 2. Nephritis: due to infection, drugs, toxic and harmful substances and other factors causing damage to the renal tubules and the surrounding tissues, patients may have symptoms of facial and bilateral lower extremity leg edema, accompanied by hematuria, lumbar and abdominal pain and other symptoms, as well as fever, fatigue, chills and other systemic manifestations. 3. Cirrhosis: Cirrhosis of the liver in the decompensated stage due to liver function decline, mostly accompanied by hypoalbuminemia, which can be manifested as edema of lower limbs, abdominal effusion and so on. 4. Malnutrition: Long-term nutritional deficiencies can cause hypoproteinemia due to severe protein deficiencies in the patient’s body, which in turn leads to malnutritional edema, which can be manifested as symptoms of leg edema. It can also be accompanied by weight loss, reduction of subcutaneous fat, anemia and so on. In addition, right heart failure, varicose veins, etc. can also lead to leg edema has not been eliminated symptoms, but this symptom alone is not enough to diagnose the disease, it is recommended that the patient timely consultation, improve the relevant examination, clear causes and then symptomatic treatment.