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Smoking a cigarette, therefore, can give someone an immediate pleasurable reaction and, as people want more of a good thing, the cycle of smoking begins. Nicotine hits the brain and causes pleasure quite quickly, and its effects wear off just as rapidly.
People experiencing nicotine withdrawal are often irritable, have a hard time sleeping and difficulty paying attention or thinking clearly. They also often end up with a huge appetite and intense longing, or craving, for a cigarette. The physical symptoms of nicotine withdrawal eventually lessen over time, frequently disappearing altogether after several weeks without nicotine. Cravings for a cigarette, however, can last a lifetime.
Smoking is the largest cause of preventable death in the world. Recent studies have found that smokers can undermine the health of non-smokers in some environments.
90% of lung cancer patients developed their disease because of smoking. Lung cancer is one of the most common causes of cancer deaths in the world. Smokers also have a significantly higher risk of developing: