Recurrence and metastasis of lung cancer is a long-standing problem in the field of lung cancer prevention and treatment. Both domestically and abroad, traditional therapies such as traditional Chinese medicine and radiotherapy have not been able to prevent recurrence and metastasis of lung cancer for a long time. To address this problem, the following will explain how to effectively prevent lung cancer recurrence and metastasis. Lung cancer is a life-threatening cancer, how to prevent recurrence and metastasis of small cell lung cancer? 1. Patients with small cell lung cancer should pay attention to their dietary habits, eat less or no spicy and stimulating foods, reduce foods that induce the spread of cancer cells, pay attention to quitting smoking and alcohol, and eat more fruits and vegetables to relieve the spread of cancer cells if their condition allows. Such as: shiitake mushrooms, cauliflower, cabbage, celery, eggplant skin, carrots and other foods. 2.Participate in sports activities appropriately to enhance physical fitness and relieve work and life stress. More exercise in the sun, more sweating can be acidic substances in the body with sweat out of the body, to avoid the formation of acid in the body. 3.Stress is the main cause of physical exhaustion, immune function decline and endocrine disorder, which leads to the recurrence of small cell lung cancer. Therefore, small cell lung cancer patients should maintain a good mental state, combine work and rest, and learn to reduce stress. Regular follow-up can prevent lung cancer recurrence and metastasis Since there is no reliable and early forecast signal for recurrence and metastasis, close monitoring and follow-up are needed for early detection of recurrence or metastasis. At present, the schedule of follow-up for patients after treatment is recommended to be every three months for the first two years, every six months after two years until five years, and annually thereafter. The doctor will take a detailed history and give the patient a physical examination, along with a plain chest x-ray. When the patient develops symptoms, corresponding CT of chest and abdomen, CT or MRI of skull and brain, bone scan and fiberoptic bronchoscopy should be performed. It is also necessary to establish confidence in overcoming cancer to prevent lung cancer recurrence and metastasis. Patients should face the reality and believe that they can overcome the disease; they should also understand the basic knowledge of lung cancer, master the precautions to prevent recurrence and metastasis, and actively cooperate with doctors in preventing recurrence and metastasis; they should choose good treatment methods for lung cancer treatment, and they should also suit themselves.