Tobacco contains a large number of harmful substances, which can cause harm to the lungs, mainly including: can cause cough and other respiratory symptoms, increase respiratory tract infections, lung cancer incidence.
1. Causing cough and other respiratory symptoms: the smoke in tobacco can directly stimulate the mucous membrane of the respiratory tract, causing cough and other related symptoms.
2. Increase the incidence of respiratory tract infections: the harmful particles in tobacco can damage the cilia and mucous membranes of the respiratory tract, reduce the local defense function, and increase the incidence of respiratory tract infections.
3. Lung cancer: Tobacco contains a lot of carcinogenic substances such as tar, long-term smoking may cause an increase in the incidence of lung cancer.
Tobacco is harmful to the body and smokers are advised to quit smoking as soon as possible.