When you quit, your body starts to heal itself almost immediately. After 20 minutes, your blood pressure and pulse rate return to normal. After only 8 hours, you'll be breathing noticeably easier. After a day, your lungs start clearing themselves out. And it just gets better from there.
20 minutes after your last cigarette
Blood pressure drops to normal.
Pulse rate drops to normal.
Body temperature of hands and feet increases to normal.
Carbon dioxide levels in the blood drop to normal.
Oxygen level in blood increases to normal.
Chance of heart attack decreases.
Nerve endings start re-growing.
Ability to smell and taste is enhanced.
Walking becomes easier.
Lung function increases up to 30%.
A decrease in coughing, sinus congestion, fatigue, and shortness of breath.
Cilia regrowth in lungs, increasing their ability to clean the lungs, reduce infection, and handle mucus.
Body’s overall energy increases.
Excess risk of coronary heart disease is half that of a smoker.
Lung cancer death rate for an average one-pack-a-day former smoker decreases by almost half.
Stroke risk is reduced to that of a nonsmoker 5-15 years after quitting.
Risk of cancer of the mouth, throat and esophagus is cut in half.
Lung cancer death rate is similar to that of nonsmokers.
Precancerous cells are replaced.
Risk of mouth, throat, esophagus, bladder, kidney and pancreas cancers decrease.
Risk of coronary heart disease is now that of a non-smoker.