Lung cancer patients in the recovery period, besides paying attention to regular life, reasonable diet and proper exercise, must prevent cold. If lung cancer patients with weak resistance are invaded by cold virus, they will soon have pneumonia, which will aggravate the damage of lung function. Therefore, recovering lung cancer patients should seek timely medical consultation when they have fever, cough and wheezing and other cold symptoms. For lung cancer patients receiving radiotherapy, a small cold may bring a fatal blow. After radiotherapy, fibrosis, similar to scarring, will appear in the radiated area and peripheral lung tissues, and the lung tissues will be like aging sponges, losing the function of air exchange. If you catch a cold at this time, the fibrotic area is prone to complicate pneumonia, leading to symptoms such as respiratory distress and even death in severe cases. Patients who have had a unilateral total lung resection usually rely on only one lung to meet their needs. If the function of one lung is damaged by a cold, the patient will experience shortness of breath and other symptoms, even when lying flat and not moving. Patients with “chronic lung disease” and “emphysema” are prone to lung infections, which will undoubtedly aggravate their condition. To prevent colds, lung cancer patients can drink astragalus water every day, in addition to improving immunity through physical exercise. The method is to use 50 grams of top quality astragalus, boil it with water for 30 minutes and drink it several times a day. In addition, don’t stay in air-conditioned house for a long time; when going out, patients had better wear a mask to prevent cold. During the recovery period, people suffering from cold should not visit the patients to avoid infection. In addition, lung cancer patients in recovery period must insist on review. It should be conducted once a month in a year and once every three months to six months afterwards. If symptoms such as chest tightness, coughing, blood in sputum and chest pain persist without relief, prompt medical consultation should be sought. The home environment during the rehabilitation period needs to be kept with fresh indoor air and regular ventilation every day to avoid smoke and oil fumes. Exercise during the rehabilitation period is mainly to restore lung function and lung capacity exercises, such as deep inhalation, balloon blowing and other exercises. Patients can also choose walking, jogging, tai chi, swimming and other items according to their own situation, and the amount of exercise is appropriate to not feel fatigue. Focus on the functional exercise of the affected upper limb to prevent dysfunction caused by long-term inactivity of the affected limb.