Cigarette smoke is a complex mixture of more than 4000 compounds, with volatiles present in the gas phase and semi-volatiles and non-volatiles present in the particles, of which gases account for 95%, such as nitrogen, oxygen, carbon monoxide, carbon dioxide and hydrogen cyanide, volatile nitrosamines, hydrocarbons, ammonia, volatile sulfides, nitrile, phenols, aldehydes, etc.. Among these compounds, nicotine is the substance that causes addiction, and tobacco tar, carbon monoxide, hydrocyanic acid, ammonia and aromatic compounds are the main toxic substances, of which at least 43 are known carcinogens. About 30% of all cancer deaths can be attributed to the use of tobacco products. Tobacco use is a risk factor for many diseases and can damage almost all organs of the body, such as the cardiovascular system, respiratory system, reproductive system, endocrine glands, and skin. Diseases and lesions associated with smoking include hypertension, coronary heart disease, stroke, peptic ulcer, cancer (lung, lip, mouth, nose, throat, esophagus, stomach, liver, kidney, bladder, pancreas, and cervix), chronic obstructive pulmonary disease, asthma, thromboembolic vasculitis, impotence, aortic aneurysm, peripheral vascular disease, leukemia, pneumonia, cataract, Crohn’s disease, hip fracture, and periodontal disease. The greater the amount smoked, the longer the duration of smoking and the earlier the start of smoking, the greater the risk of smoking-related diseases and death.