Malignant pleural ascites is a common comorbidity of many advanced malignant tumors, which is stubborn and not easy to control, causing great pain to patients, and can even cause rapid deterioration of the disease to death. Among many patients with pleural fluid, 46%-64% of them are caused by malignant tumors, which is one of the signs of disease progression to advanced stage. And more than 60% of gastrointestinal tumors present malignant peritoneal effusion in advanced stage. At present, modern medicine mainly adopts pleural fixation, thoracoabdominal puncture and drainage, intracavitary perfusion chemotherapy, local immunotherapy and other means, the efficiency of which is mostly in the range of 60% to 80%, even if the efficiency of intracavitary chemotherapy or immunotherapy is only 20% to 50%, which is much lower than the average efficiency of general local treatment. Conventional puncture and aspiration requires repeated aspiration and incomplete aspiration due to the limited amount of fluid each time; in addition, repeated thoracic puncture not only causes pain to patients, but also increases the chance of complications such as encapsulated effusion, pneumothorax, hemothorax, subcutaneous cancer cell implantation and infection. However, more than 70% of the advanced patients with weak constitution cannot bear the above treatment. Therefore, the method of external application of traditional Chinese medicine to the abdominal wall fully reflects the characteristics of “simple, convenient, experimental and inexpensive” of traditional Chinese medicine and is suitable for clinical application. The Department of Integrative Medicine and Oncology, giving full play to the external treatment characteristics of TCM, has developed the external treatment technique of TCM for malignant thoracic and abdominal effusion after more than 20 years of clinical research, which has achieved good clinical efficacy. Its simple, convenient, experimental and inexpensive features are especially suitable for the clinical rehabilitation application of tumor patients. It is introduced as follows: Chinese medicine external treatment of malignant thoracic and abdominal effusion technology: I. Drug preparation process: Drug composition: astragalus, cinnamon branch, curcuma longa, stork grass, ice chips, etc.; equipment preparation: tap water (room temperature), 1 glass rod, glass pipette, sterile plastic medicine box (spittoon box size), non-woven cotton yarn plaster paste, benadryl cream 1 box, single Chinese medicine formula particles: astragalus, cinnamon branch, curcuma longa, stork grass Sufficient amount Preparation process: 1, take the medicine: weigh the single Chinese medicine formula particles astragalus 7g, cinnamon branch 3g, curcuma 5g, stork 5g, ice chips 5g, a total of 25g placed in the medicine box. 2, add water: use a measuring cylinder to measure about 7ml of room temperature tap water, pour it into the medicine box, and use a glass rod to stir fully until it is mixed into a paste. At this time, the production of water elimination cream has been completed, its color is brown, paste-like, slightly aromatic smell. Clinical application process: 1. Applicable groups: Tumor patients with combined malignant thoraco-abdominal fluid and skin without infected wounds. 2.How to use: Take about 10g of anti-cancer anti-water cream, evenly paste it on the affected side of malignant effusion in the projection area of body surface, about palm size area, thickness about 5mm, and apply fresh film outside, if the amount of effusion is more, the dressing area and drug dosage can be increased appropriately according to the situation. 3.Course of treatment: change medicine once a day for 8 hours each time, 5 days a course of treatment. The common adverse reactions of this technique are skin irritation and skin allergy. Those with mild symptoms and only slight itching can add a small amount of Benadryl cream to the water elimination cream and continue to apply externally; those with red rash can add a small amount of Benadryl cream to the water elimination cream and continue to apply externally, while taking oral anti-allergic drugs such as paracetamol; those with serious symptoms should stop the drug and seek medical consultation in time. All of the above topical techniques should be applied under the guidance of a physician, and should be used with caution by those with physical allergies.