Bloating of the stomach in the advanced stage of costochondrosarcoma may be caused by peritoneal metastasis and formation of ascites, and it may also be caused by gastrointestinal dysfunction. The malignant degree of costochondrosarcoma is relatively high, and metastasis and proliferation often occur in the late stage. If metastatic lesions appear in the peritoneal area, it is very likely to stimulate the peritoneum and form a large amount of ascites, which will lead to the symptom of bloating in the patient’s stomach. In the advanced stage, chondrosarcoma of the rib may also have certain influence on the endocrine function of the body, which may cause gastrointestinal dysfunction, and then abdominal distension, abdominal pain and other abnormal symptoms will also appear. When chondrosarcoma of the rib develops into the advanced stage, it is necessary to pay attention to the light diet, and at the same time, it is necessary to carry out surgery or radiotherapy and targeted therapy in time to stabilize the condition, which can make the symptoms of abdominal distension gradually reduce.