The postoperative chemotherapy regimen for colon cancer patients is relatively mild, and only a small number of patients will experience nausea and vomiting gastrointestinal reactions, as well as diarrhea and constipation to varying degrees. For colon cancer patients with vomiting, first of all, tell them not to be nervous, as vomiting is a common gastrointestinal reaction to chemotherapy, and most of them can be relieved through active intervention and treatment. When vomiting occurs, patients should be encouraged to eat more, mainly liquid, light and easy to digest food, and not to refuse to eat because of vomiting. If the patient vomits, antiemetic medication can be added to relieve the symptoms. Encourage patients to eat more easily digestible food and avoid spicy and irritating food as much as possible. The most important thing is to stop patients from smoking and drinking.