First, tobacco contains a lot of harmful substances, such as benzopyrene, aromatic amine, tar, nicotine and so on. It has carcinogenic effect and can lead to an increase in the incidence of cancer. Incidence of esophageal cancer, lung cancer, nasopharyngeal carcinoma, etc. It has something to do with smoking.
Second, smoking can stimulate the respiratory tract, causing congestion and edema of respiratory mucosa, leading to irritating cough, which can induce cough variant asthma or pharyngitis.
Third, long-term smoking will damage cardiovascular health, leading to a decline in vascular elasticity.
Fourth, smoking will lead to a decline in taste.