After chemotherapy, the treatment of stomach discomfort is mainly through light diet, oral protection of gastric mucosa, and antiemetic drugs to alleviate symptoms. Most patients are prone to stomach discomfort, nausea, vomiting and other symptoms during chemotherapy. The common reactions are mainly due to the irritation of gastrointestinal mucosa caused by the use of chemotherapy drugs, which also acts on the vagus nerve by releasing neurotransmitters. Stimulate vomiting center to cause nausea and vomiting. During chemotherapy, patients should eat a light diet, eat less and eat more meals, and avoid spicy and irritating food. If stomach discomfort often occurs, according to the doctor's opinion, take orally drugs to protect the gastric mucosa. Long acting drugs, such as omeprazole, can inhibit the secretion of gastric acid, which can reduce the symptoms of stomach discomfort in patients. In addition, it can also cooperate with antiemetic drugs, such as ondansetron, metoclopramide, etc., to reduce nausea and vomiting. If necessary, it can also be assisted by traditional Chinese medicine.