The presence of ascites does not necessarily mean that the cancer is at an advanced stage. However, if ascites is caused by cancer, it is mostly caused by the spread of cancer cells to the abdominal cavity, and distant metastasis of cancer cells usually occurs in the advanced stage of cancer. In addition, ascites may also be related to the uncompensated stage of liver cirrhosis, peritonitis, heart failure and other diseases. If ascites occurs, it is recommended that patients actively clarify the cause of the disease and cooperate with the treatment. The presence of ascites does not necessarily mean that the cancer is at an advanced stage, because the decompensated stage of liver cirrhosis, peritonitis, heart failure and other diseases may cause ascites. However, if ascites is caused by cancer, most of them belong to the advanced stage of cancer. This is because advanced cancer cells metastasize to distant places and transfer to the abdominal cavity to cause ascites. As ascites caused by advanced cancer leads to obvious abdominal distension and other discomforts, a drainage tube can be put in to drain the fluid and relieve the symptoms. It is suggested that patients should go to the hospital for consultation in time to clarify the cause of the disease. Liver function test, renal function test, abdominal puncture, ascites routine, ascites biochemistry, CT, electrocardiogram and other tests can be carried out to clarify the cause of the disease and treat the cause.