Gastric carcinoma in situ is not fine after resection, it is necessary to pay attention to controlling various risk factors and regular review to prevent recurrence. Gastric carcinoma in situ indicates that the cancer is in the early stage of the disease. After early surgery, the cancerous tissues can be completely removed, and the survival period of the patient is relatively long, and the patient will not even be affected by the cancer. However, after surgery for carcinoma in situ, it does not mean that the cancer will not recur. Patients still have risk factors for cancer, and they need to treat their bad habits, such as avoiding smoking and drinking alcohol, not eating pickled products, and actively treating Helicobacter pylori infection, so as to avoid the recurrence of gastric cancer caused by risk factors. After surgery, patients should also undergo regular review, such as regular gastroscopy to understand the changes of gastric mucosa and prevent recurrence of the disease, and monitor the changes of tumor markers of gastric cancer at the same time. After surgery of gastric cancer, patients should go to the hospital for regular follow-up, control risk factors under the guidance of physicians, and have gastroscopy on a regular basis.