Quitting smoking reduces your cancer risk substantially when compared to continuing smoking. Cessation of smoking definitely improves pulmonary function and decreases the prevalence of respiratory symptoms. Quitting also reduces the chance of premature death from chronic bronchitis and emphysema and does diminish an individual's risk of dying. Life expectancy is shortened by the number of years as a smoker and the amount smoked. Also, women who both smoke and use oral contraceptives have increased risk of strokes and blood clots and peptic ulcers.
Addiction is the answer .
Nicotine is a highly addictive substance, as powerful as heroin and alcohol for some. Chewing tobacco is even more addictive and causes oral and throat cancers in young adults. A few heavily addicted smokers require the Acupuncture Injection Technique , originally developed in Singapore for opium addicts, to help stop their withdrawal. The injections have been used in France for many years and over 80,000 smokers have quit using this aid. The effects last about three weeks which is the length of time it takes the brain to unlearn a habit.