Constipation after chemotherapy for breast cancer is generally caused by the damage of small intestine mucous membrane caused by chemotherapy drugs or antiemetic drugs affecting gastrointestinal dynamics, which can be improved through dietary regulation, appropriate exercise, increasing water intake, etc., and if necessary, drugs promoting gastrointestinal dynamics can be taken under the guidance of professional doctors. 1. Dietary adjustment: If constipation occurs after chemotherapy for breast cancer, dietary adjustment can be carried out, focusing on light food, eating more fluids, soups, fresh vegetables and fruits, maintaining low-salt, low-fat diet, avoiding barbecue, frying, spicy and stimulating or cold food to improve the constipation symptoms. 2. Appropriate exercise: for patients with constipation after chemotherapy for breast cancer, they can exercise appropriately, increase the activity level, avoid sitting or lying down for a long time, promote peristalsis, and help to improve constipation. 3. Increase water intake: If constipation occurs after chemotherapy for breast cancer, water intake should be increased appropriately, such as drinking a glass of warm water or honey water every morning, which can reduce constipation. 4. Taking medicines to promote gastrointestinal power: If constipation occurs after breast cancer chemotherapy and can’t be relieved, you can take medicines to promote gastrointestinal power under the guidance of professional doctors, such as mosapride, cisapride, etc., to relieve constipation. Once constipation occurs after breast cancer chemotherapy, it is recommended to give timely feedback to the treating doctor and adopt the correct method to relieve constipation, not to blindly use medication on your own.