吸烟对口腔、鼻腔、喉头和呼吸道有不良刺激作用,会引起恶心、气短、肺气肿、支气管炎、食欲不振和心律的改变。流行病学研究还证实吸烟者喉、舌、齿龈、口腔粘膜、腭、鼻腔、食道、肝、胰腺、肾和膀胱肿瘤发病率均比不吸烟者高,间接吸烟者的致癌性也高于不吸烟者。烟草点燃后生成的烟雾组分很复杂,主要含有二氧化碳、一氧化碳、各种氮氧化物、焦油、尼古丁,苯并芘,邻苯二酚、挥发性亚硝胺类;如N-亚硝基二甲胺、N′-亚硝基四氢化吡咯及亚硝胺类, Smoking has unpleasant stimulatory effects on the mouth, nose, throat, and respiratory tract and can cause nausea, shortness of breath, emphysema, bronchitis, loss of appetite, and changes in heart rhythm. Epidemiological studies also confirmed that the incidence of smokers throat, tongue, gums, oral mucosa, sputum, nasal cavity, esophagus, liver, pancreas, kidney and bladder tumors are higher than non-smokers, and indirect smokers are also more likely than non-smokers. Smoker. The composition of the smoke produced after tobacco ignition is very complicated, mainly containing carbon dioxide, carbon monoxide, various nitrogen oxides, tar, nicotine, benzopyrene, catechol, volatile nitrosamines, such as N-nitroso Methylamine, N’-nitrosotetrahydropyrrole and nitrosamines,