There is no precise data on the average life expectancy of smokers, but long-term smokers are not good for their health, and most smokers do not reach their life expectancy, and their life expectancy will be shortened. Cigarettes contain a variety of carcinogenic ingredients, such as nicotine, tar and carbon monoxide, which can damage the function of human organs and lead to a series of diseases in the human body, including cancer of the oral cavity, pharynx, esophagus, lungs, bladder, and so on, and can also cause heart disease and brain disease. Compared to non-smokers, the life expectancy of long-term smokers may be reduced by four to five years, or even ten years in some cases. In addition, long-term smokers are also bad for their skin, which tends to lose its elasticity and luster, accelerating the aging of the skin and resulting in wrinkles. In summary, the harm of smoking on the human body is multi-faceted, for the sake of their own health, it is recommended that we try to quit smoking, so that you can properly extend life, to avoid long-term smoking on the human organs caused great harm, as well as the life of the unnecessary impact. If smoking appears various uncomfortable symptoms, it is recommended to consult a doctor in time.