People believe cancer is the only prominent disease caused by smoking. But smokers who do not have cancer suffer from different major problems such as restlessness, bad breath, anxiety and irritability, high cholesterol, heart diseases , immune system, unhealthy teeth, low sense of smell and taste , regular coughing and so on. There is a layer of tar produced from smoke deposited in the lungs and respiratory track of the smokers. And even after an individual quits smoking it is very difficult to get completely rid of these impurities present inside the respiratory system. Presence of such impurities has a long term effect on smoker’s body even after quitting smoking cigarettes. The immune system is adversely affected and in many cases mild weakness is also observed and it is result of the difficulty in breathing arrived due to collection of tar particles generated due to smoking.