Window period of small cell lung cancer means that after chemotherapy, the condition is under control and it is basically more stable, and the patient’s condition is also the mildest in this stage. It is necessary to pay attention to regular review, choose light and easy-to-digest food in diet, and also take anti-tumor Chinese patent medicines under doctor’s guidance, such as Pingfeng capsule and Cancer elimination tablets. After radiotherapy and chemotherapy, small cell lung cancer enters into the window period, at this time, attention should be paid to regular review, usually every 3 months, the review items include blood routine, tumor markers, chest CT, craniocerebral CT, abdominal CT, etc. If there is headache, dizziness or other symptoms, it is recommended to pay attention to regular review, usually every 3 months. If headache, dizziness, nausea, chest tightness, dyspnea and other discomforts occur, consult a doctor promptly. Take anti-tumor drugs under doctor’s guidance. In addition, try to choose light and easily digestible food in diet, such as milk, eggs, soy products, lean meat, fresh vegetables and fruits. Maintain a pleasant mood, appropriate exercise, avoid overwork and so on.