This is what happens to your body when you quit smoking:
After 20 minutes your pulse and blood pressure drop. Your hands and feet become warmer.
After 8 hours the concentration of carbon monoxide in the blood sinks. The oxygen level increases.
After 48 hours your smell and taste improves.
After 72 hours the bronchial tube relax.
After 2weeks to 3 months, circulation, lung functions and condition improve.
After 1-9 months your airways become freer. Your couching starts going away.
After 1 year the risk of heart disease is cut in half.
After 5 years the risk of having a stroke is the same as that of a non-smoker.
After 10 years the risk of getting lung cancer is also half as high as that of a smoker.
after 15 years the risk of getting heart disease is just as high as that of a non-smoker.
Your body heals itself in just 5 years all on its own.