Doctors need to clarify what causes ascites, as well as clarify the nature and amount of ascites, in order to determine whether to advanced stage, can not be generalized. Ascites is mostly caused by cirrhosis, tuberculous peritonitis, malignant tumors, constrictive pericarditis, etc. It can also be seen in patients with long-term malnutrition, the specific analysis is as follows: 1, cirrhosis: patients with cirrhosis in the decompensated stage can appear ascites, generally manifested as yellowish leakage fluid, the amount can cause significant abdominal expansion, is the result of the joint action of liver decompensation and portal hypertension, often indicates Cirrhosis is in the middle and late stages; 2, tuberculous peritonitis: is due to Mycobacterium tuberculosis caused by chronic diffuse peritoneal infection, if there is an exudative peritoneal fluid, also known as ascites, usually presented as straw yellow or light blood, the amount of fluid in the medium or below. At this time does not indicate that it is in the advanced stage of the disease, if the ascites can be put more ascites, and then active anti-tuberculosis treatment, can effectively relieve the symptoms, but also to prevent the occurrence of complications; 3, malignant tumors: if the patient suffers from malignant tumors, such as liver cancer, ovarian cancer, gastric cancer, at this time, ascites, consider that it may be caused by cancer cells metastasis to the abdominal cavity, at this time the probability is in the advanced stage, but need to combine with imaging 4, constrictive pericarditis: when constrictive pericarditis patients appear ascites, usually also indicates that the disease is more serious, suggesting that the disease is at an advanced stage, requiring timely treatment; 5, malnutrition: if long-term improper diet or excessive weight loss caused by severe malnutrition, may be due to protein deficiency, resulting in lower blood osmotic pressure, causing increased ascites generation, need to timely adjustment Dietary structure can be improved, usually not very serious, and there is no late term. Therefore, the stage of the disease cannot be judged by the symptoms of ascites alone, and patients need to improve the relevant tests under the guidance of the doctor to make a clear judgment before analyzing, so that further targeted measures can be taken for treatment.