Two to three weeks after quitting:·The body begins to regenerate and heal
Circulation and heart function will improve significantly .
Lungs will begin to clear, allowing easier breathing.
·Physical activity will be possible without feeling winded
One to nine months after quitting:
The cilia inside the lungs will begin to repair, pushing mucous out of the lungs and allowing the body to fight off infection
Coughing and shortness of breath will continue to decrease dramatically
Withdrawal symptoms normally take 3 to 9 months to go away completely after quitting. The length of time it takes varies depending on how long and how often you smoked before quitting.