After the intervention, some anti-emetic drugs are usually used to relieve nausea and vomiting caused by chemotherapy; on the other hand, patients eat less. On the other hand, patients eat less fiber-rich diet, plus patients are usually bed-bound, and severe vomiting may be accompanied by hypokalemia, all of which can cause abdominal distension and constipation. Therefore, it is important to eat after the intervention and encourage early movement out of bed. If the constipation is severe, tell the physician, who will deal with it accordingly, so there is no need to be nervous.