The side effects of immunotherapy for lung cancer are common, such as endocrine system changes, skin damage, gastrointestinal mucous membrane damage, immune myocarditis and other serious complications. 1. endocrine system changes: hypothyroidism or hyperthyroidism, and so on. 2. skin damage: skin rash, skin erythema or itching, and skin toxicity. 3. gastrointestinal mucosal damage: common symptoms include abdominal pain, diarrhea, bloating and anorexia. 4. immune myocarditis: the main symptoms include chest pain, shortness of breath, pulmonary edema, double lower extremity edema, arrhythmia, acute heart failure, etc. 5. Other serious complications: there may also be associated pneumonia, such as immune-associated pneumonia, and there may be different degrees of damage to the liver and kidneys, with reduced organ function. Patients should adjust their emotions in daily life and face the disease with a positive attitude. At the same time, they need to improve their life style, quit smoking and take proper exercise. Lung cancer patients should be supplied with easily digested and absorbed food rich in protein to improve the body’s anti-cancer ability. Regular review is needed after lung cancer treatment. In order to monitor the efficacy, early detection of tumor recurrence and metastasis. If patients feel unwell, they should consult doctors in time and take appropriate treatment.