There is no medicine against recurrence after lung in situ cancer surgery, patients can prevent the disease from recurring by adopting good living habits and regular checkups. Surgery for lung in situ cancer refers to the use of surgical resection method to remove the tumor tissue. The possibility of recurrence after surgery is small. Patients can develop good living habits in daily life, such as taking a light diet, moderate exercise, avoiding staying up late and relaxing their moods, etc., to avoid recurrence of the disease. At the same time, patients should have regular medical checkups and keep a follow-up visit once every 3 to 6 months after the operation, and the follow-up time can be adjusted according to the condition in the later stage. Patients need to check lung CT, tumor markers, blood routine, liver and kidney functions, etc. to know the recovery situation after surgery. After lung in situ cancer surgery, if patients have any discomfort, it is recommended to go to the hospital in time for diagnosis and treatment by professional doctors to prevent recurrence of the disease.