Abdominal distension and edema may be caused by pulmonary heart disease, renal disease, liver disease, heart failure and other reasons. 1. Pulmonary heart disease: for example, pulmonary hypertension, chronic obstructive pulmonary disease, etc., which can lead to the right ventricle blood can not flow into the lungs, and cause the right atrium blood reflux is impeded, resulting in abdominal distention and edema. 2. Kidney disease: such as renal syndrome, chronic nephritis, etc., which leads to decreased glomerular filtration capacity and sodium retention, causing abdominal distension and edema. 3. Liver disease: viral hepatitis, fatty liver and other diseases, which may lead to cirrhosis, portal hypertension, hypoproteinemia and other causes of abdominal distension and edema. 4. Heart failure: the left ventricle and right ventricle ejection function decreases, the heart can not pump blood to supply the whole body in time, and the venous return is blocked, which leads to abdominal distention and edema. Abdominal distension and edema, there may be other reasons, it is recommended to consult a doctor in a timely manner to identify the cause of the disease, as soon as possible treatment.