Your lungs are self-cleaning, which means they will gradually heal and regenerate on their own after you quit smoking. However, there are certain lifestyle behaviors you can practice to try and accelerate the rate at which your lungs heal.
1 to 12 months after quitting
Tiny hair-like structures (called cilia) that move mucus out of the lungs start to regain normal function, increasing their ability to handle mucus, clean the lungs, and reduce the risk of infection.
Quitting smoking reverses lung cell damage even for decade-long smokers. It's never too late to quit smoking, as a new study shows the lung's ability to heal and regrow damaged cells caused by cigarette smoking, even if they smoked for decades.
Your lungs have an almost "magical" ability to repair some of the damage caused by smoking - but only if you stop, say scientists. The mutations that lead to lung cancer had been considered to be permanent, and to persist even after quitting.
It's never too late to get benefits from quitting smoking. Quitting, even in later life, can significantly lower your risk of heart disease, stroke, and cancer over time and reduce your risk of death.
Generally if you haven't smoked for 12 months or more, you're considered a non-smoker.
Within two weeks of quitting smoking, you may start to notice you're not only breathing easier. You're also walking easier. This is thanks to improved circulation and oxygenation. Your lung function also increases as much as 30 percent about two weeks after stopping smoking, notes the University of Michigan.
Common symptoms include: cravings, restlessness, trouble concentrating or sleeping, irritability, anxiety, increases in appetite and weight gain. Many people find withdrawal symptoms disappear completely after two to four weeks.
If you decide to go ahead and smoke just one, chances are you'll be back to smoking as much as you used to before long. Don't kid yourself that you can control nicotine once you get a taste of it. It just doesn't work that way for nicotine addicts.
Background: Heavy smokers (those who smoke greater than or equal to 25 or more cigarettes a day) are a subgroup who place themselves and others at risk for harmful health consequences and also are those least likely to achieve cessation.
At three weeks, you've likely gotten through the shock of physical withdrawal. Now you're beginning to tackle the mental side of nicotine addiction, or psychological withdrawal. 2 This turn of events often triggers cravings to smoke that can feel like you're back at square one.
1: Vaping is less harmful than smoking, but it's still not safe. E-cigarettes heat nicotine (extracted from tobacco), flavorings and other chemicals to create an aerosol that you inhale. Regular tobacco cigarettes contain 7,000 chemicals, many of which are toxic.
Lung disease: Vaping can make asthma and other existing lung diseases worse. Breathing in the harmful chemicals from vaping products can cause irreversible (cannot be cured) lung damage, lung disease and, in some cases, death.
The mystery of why some people appear to have healthy lungs despite a lifetime of smoking has been explained by UK scientists. The analysis of more than 50,000 people showed favourable mutations in people's DNA enhanced lung function and masked the deadly impact of smoking.
Light smoker: a smoker who reports consuming between 1-10 cigarettes per day. Moderate smoker: a smoker who reports consuming between 11-19 cigarettes per day. Heavy smoker: a smoker who reports consuming 20 cigarettes or more per day.
Cigarette cravings typically peak in the first few days after quitting and diminish greatly over the course of the first month without smoking. 1 While you might miss smoking from time to time, once you make it past six months, the urge to smoke will be diminished or even gone.
Cravings for nicotine can start 30 minutes after your last cigarette. Individual cravings usually pass in 3 to 5 minutes. You may get the most cravings 2 to 3 days after you stop smoking. You should stop getting cravings 4 to 6 weeks after you stop smoking.
Relapse occurs most often during the initial days of quitting (6); however, longitudinal studies have shown that a substantial proportion of quitters who remain abstinent early in the quit attempt, actually go on to relapse after being quit for months or even years (5, 8-10).
"The best way to quit smoking is with a combination of medication and counseling," says Maher Karam-Hage, M.D., medical director of the Tobacco Treatment Program at MD Anderson. "They both help. But you double your chances by using both compared with one of them."