Soon after you quit, your body will receive more oxygen and you will notice you have more energy and feel a little less stressed. Your cough will go away, although for some it may take weeks as your lungs clean themselves by bringing up mucus. Your eyes and throat will feel less irritated. Your senses of taste and smell will improve. Your risk of heart attack and stroke drop quickly. Over time, you'll have fewer colds and respiratory infections, and your body will repair some of the damage previously caused. In the long run, you reduce your risk of lung cancer as well as chronic obstructive pulmonary disease (COPD), which includes chronic bronchitis and emphysema, and is the fourth-leading cause of death in the U.S. You will also have fewer wrinkles, whiter teeth and will no longer smell like tobacco. You'll even save money—lots of it!