Abdominal bloating after breast cancer chemotherapy is usually caused by gastrointestinal discomfort, chemotherapy side effects, metastatic spread of cancer cells and other reasons. 1. Gastrointestinal discomfort: chemotherapy for breast cancer will cause gastrointestinal discomfort, abdominal distension, nausea, vomiting and other symptoms, and abdominal distension after chemotherapy for breast cancer. 2. Chemotherapy side effects: breast cancer chemotherapy will cause side effects such as vomiting, diarrhea, fatigue, etc., and abdominal distension after breast cancer chemotherapy will occur. 3. Metastasis and spread of cancer cells: metastasis and spread of cancer cells will lead to ascites, resulting in abdominal distension, cough and other symptoms after breast cancer chemotherapy, leading to abdominal distension after breast cancer chemotherapy. It is recommended that patients go to hospital for examination in time and pay attention to body care as well as diet.