Water in the stomach, also known as ascites, is seen in many kinds of causes. If it is caused by inflammation, it is relatively not serious and the symptoms can gradually improve with active anti-infection treatment. If the fluid in the abdomen is caused by malignant tumor, it is very serious in this case and is also a manifestation of advanced stage, the patient will have obvious abdominal pain, abdominal distension, nausea, vomiting, and will also suggest anemia and hypoproteinemia, progressive consumption, in addition to the occurrence of spontaneous peritonitis, the patient will have chills and high fever, so treatment should be carried out systematically, and the primary disease should be treated as actively as the condition allows. The disease should be treated systematically and the primary disease should be treated as aggressively as the condition allows. A large amount of ascites can also be relieved by laparoscopic drainage under local anesthesia. Infection prevention should also be actively pursued with a broad-spectrum cephalosporin combined with metronidazole or ornidazole given intravenously and a high protein diet if the condition permits.