It is important to note that the hazards and consequences of passive smoking are also very serious and must be given high priority. It has been clinically proven that passive smoking can also induce slow-onset asthma, asthma, emphysema, pulmonary heart disease and lung cancer. The vast majority of children, adolescents and middle-aged and elderly women who do not have a history of smoking have a persistent cough and asthma that is caused by smoking by family members or colleagues. In recent years, I have seen 8 cases of non-smoking female lung cancer patients, 7 of which were middle-aged and elderly women whose partners were long-term heavy smokers, and one 80-year-old woman, whose partner and older son died of lung cancer successively due to smoking, and the younger son still did not accept the lesson and continued to smoke. The remaining 6 patients included 4 cases of small cell lung cancer, all of whom had metastases in the hilum and mediastinal lymph nodes at the time of consultation, and 2 cases had both pleural and pericardial metastases, all of which were advanced lung cancer. surgery and lost contact. There was another case of a 28-year-old young woman who lived with her smoking parents for a long time before marriage at the age of 25, and felt dyspnea 3 months after delivery at the age of 28. On chest X-ray and CT examination, a huge mass was formed by a huge tumor in the left hilar lung with mediastinal metastasis in the hilar lung with left upper obstructive pulmonary atelectasis, and pathology confirmed small cell lung cancer. This case and the above-mentioned case of small cell lung cancer with pleural and pericardial metastasis both had been treated with anti-cancer drugs, but they both gave up further treatment because of strong drug reactions and sighed that “life is worse than death”, and died in pain within six months.