Nicotine and its influence on dopamine in the brain are connected to the emotional repercussions of smoking. Dopamine is a brain molecule that plays an important role in emotional reactions and reward-motivated behavior. Smokers first experience a sense of calm and a reduction in tension and anxiety as a result of this impact. As they become more dependent on nicotine, smokers begin to feel irritable without cigarettes and suffer from cravings for them. When they try to quit, smokers experience unpleasant feelings such as stress, frustration, and depression. These emotions are caused by the fact that stopping smoking means giving up something that has been providing comfort all these years. In addition to these psychological effects, smoking can also have physical consequences. If you smoke, you increase your risk of developing diseases such as lung cancer, heart disease, and diabetes. Smoking affects everyone differently. The type and intensity of an individual's reaction to tobacco use is determined by many factors: age when he or she starts smoking, how long he or she smokes, how much he or she smokes, whether he or she uses tobacco products such as cigars or pipes, and what kind of tobacco he or she smokes. In addition, environment, genetics, and life circumstances play a role. It is not possible to predict exactly how someone will react to smoking. However, some people may be more sensitive to its effects than others.