After cancer has been cured or controlled, attention must be paid to preventing recurrence. Four major aspects should be paid attention to prevent or reduce cancer recurrence. Firstly, cancer treatment should aim at being complete. This can be easily done for early stage cancer, but it is difficult to be absolutely complete for middle and late stage cancer, i.e. it is difficult to avoid some cancer cells remaining in the body. Therefore, anti-recurrence treatment should be carried out immediately after regular treatment, with the aim of eliminating the remaining cancer cells or inhibiting the further development of cancer cells that were not detected. Secondly, to eliminate or avoid factors that cause cancer recurrence and actively treat chronic diseases related to cancer. Various physical and chemical factors and biological carcinogenic factors that cause cancer can induce cancer recurrence, so they should be eliminated and avoided as much as possible, and special attention should be paid to some internal factors. All cancer patients should pay attention to keep a happy mood and relaxed spirit, and avoid long-term and excessive mental tension and bad stimulation. In addition, strengthening physical exercise and improving immune function and disease resistance of the body are also important links to effectively prevent cancer recurrence. During the recovery process after cancer cure, some exercise exercises suitable for patients should be carried out according to the actual situation, such as qigong, taijiquan, jogging and so on. The function of these exercises is to promote the recovery of the patient’s whole body functions, mobilize the positive factors of the whole body, enhance the resistance to disease and reduce the chance of cancer recurrence. Finally, it is important to conduct regular review. It includes self-examination by patients and regular examination by hospitals. The main purpose of self-examination is to observe whether there are any new swellings, nodules, ruptures and other manifestations in and around the original lesions, and whether there are any new pain sensations. In addition, attention should be paid to the systemic changes, whether there is gradually increasing weakness, loss of appetite, weight loss, anemia and other manifestations, once the above situation occurs, promptly go to the hospital for consultation.