Tobacco can damage almost all organs of human body, and quitting smoking can effectively prevent or delay the progress of smoking-related diseases. It is found that the death risk of patients with coronary heart disease can be reduced by about half after quitting smoking 1 year, and will continue to decrease with the extension of quitting smoking time. After quitting smoking 15 years, the absolute risk of death of patients with coronary heart disease will be similar to that of never smokers.

Quitting smoking and preventing exposure to secondhand smoke are the most important means to prevent and treat COPD, and quitting smoking is the only way to effectively delay the progressive decline of lung function. Quitting smoking can also reduce the incidence and mortality of stroke, peripheral vascular disease, pneumonia and gastric and duodenal ulcers. Therefore, quitting smoking is an important part of treating various smoking-related diseases.

Extended data

Cognitive misunderstanding of quitting smoking

1. Tobacco "low tar" has low harm.

Smokers have "smoking compensation behavior" in the process of smoking "low tar cigarettes", including blocking the pores of the filter mouth with fingers and lips, increasing the amount of tobacco smoke inhaled and increasing the number of cigarettes smoked. The existence of smoking compensation behavior has not reduced the harmful components such as tar and nicotine inhaled by smokers.

2. "Chinese herbal medicine smoke" has low harm.

Because the original aroma of tobacco leaves is affected after the tar content is reduced, the tobacco industry has added various spices, additives or Chinese herbal medicines to cigarettes. But so far there is no evidence that these are safe.

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