Cigarette smoke contains carcinogenic substances, cigarette smoke contains more carcinogenic substances, it is recommended to reduce smoking in life, away from the smoking crowd, to avoid affecting health. Cigarette smoke contains carcinogenic substances, cigarette smoke contains a large number of carcinogenic substances, including dimethyl nitrosamine, methyl ethyl nitrosamine, diethyl nitrosamine, vinyl chloride, benzopyrene, hydrogen cyanide, formaldehyde, polycyclic aromatic hydrocarbons, nitrogen oxides, heavy metals, carbon monoxide, nicotine and other harmful substances. Long-term inhalation of harmful substances can affect your health and lead to lung cancer, esophageal cancer and many other diseases. It is recommended to reduce the frequency of smoking in daily life, and people who do not have the habit of smoking should try to stay away from people who smoke to prevent second-hand smoke from affecting their health. Cigarette smoke contains a large number of carcinogenic substances, so you should smoke less and try not to come into contact with cigarette smoke to avoid discomfort. It is recommended that you develop healthy habits in your life that are conducive to good health.