So how does the body react when you stop smoking? Well, there are beneficial effects that occur almost immediately, and some other good things happen over time.
After 20 minutes, the blood pressure and pulse rate return to normal. After 24 hours, the carbon monoxide is being removed from your body.
After 48 hours, the nicotine is expelled from the body. Between two and 21 weeks, the circulation improves.
After one year, your risk of a heart attack falls to half that of a smoker. After ten years, your risk of lung cancer falls.