Patients with advanced cancer cannot heal themselves, and their condition will gradually worsen because the malignant tumor develops rapidly, and the patient will become cachectic, with obvious anemia and hypoproteinemia, as well as peripheral tissue edema and fluid accumulation. For patients with advanced disease, the main treatment is symptomatic treatment to reduce the patient’s pain and improve the quality of life in the later stage. If the patient has obvious pain, pain-relieving drugs can be given as needed, commonly used are morphine tablets, morphine sulfate extended-release tablets, etc. In addition, if there is a large amount of fluid in the body cavity, puncture and drainage can also be performed under local anesthesia to relieve the patient’s symptoms of restricted breathing, as well as to prevent infection and complications related to spontaneous peritonitis as needed.