There are many reasons for cancer bloating, mainly including tumor itself and complications caused by tumor: First, tumor itself, such as extensive metastasis of stomach, intestine and ovarian cancer in the abdominal cavity, and the enlarged masses compressing the abdominal cavity and intestinal tube leading to slowing down of intestinal peristalsis, will result in more obvious bloating. Secondly, the tumor metastasis in the abdominal cavity will lead to abdominal fluid accumulation, because a large amount of abdominal fluid will lead to abdominal distension. Thirdly, the complications of tumor, such as intestinal adhesions caused by tumor and slowed intestinal peristalsis caused by tumor, will also lead to abdominal distension and pain. There are also reasons for eating, such as long-term constipation and difficulty in exhaustion, which can lead to abdominal distension. The main treatment is: first, anti-tumor treatment, only when the tumor is small and ascites is reduced, the symptoms may be relieved. Second, symptomatic treatment, for example, you can use some drugs to promote the peristalsis of the gastrointestinal tract, you can use some drugs for anal exhaustion, so that the patient’s belly distension will also be relieved. Third, pay attention to the smooth passage of stool, as I said earlier, use drugs to promote digestion, laxative drugs or enemas, etc., so that the stool can be discharged smoothly, the patient’s abdominal distension symptoms will be significantly relieved.