Patients with gastric cancer who have vomiting after eating should find out what causes it specifically. In the absence of surgery, it is considered to be gastric cancer caused by sinus cancer, which may cause pyloric obstruction, and active surgical treatment measures should be taken, including radical gastric cancer surgery or major gastrectomy. For patients who cannot tolerate larger surgery, palliative surgery for gastric cancer can also be performed by anastomosis of the stomach and jejunum. If the reaction is caused by radiotherapy or chemotherapy after gastric cancer surgery, certain antiemetic drugs, including clinical antiemetic drugs for chemotherapy, should be given to relieve the complications caused by adjuvant therapy after gastric cancer surgery. At the same time, if there are metastases to multiple organs of the body, including liver and lung metastases due to advanced gastric cancer, there is no particularly effective way to maintain the basic physiological needs of gastric cancer patients in the late stage, but to give intravenous or parenteral nutrition while eating water.