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72 Hours. In as little as 72 hours after you quit smoking, your lungs will begin to heal themselves. Airway inflammation decreases and the bronchial tubes begin to relax.Breathing becomes slightly easier and lung functionality begins to increase. Weeks to 3 Months. It is between a couple of weeks and a few months that your lung capacity increases significantly; lung capacity can improve by as much as 30 percent. This is most noticeable as walking and other physical exercise becomes easier.
In addition, after you quit smoking, the cilia in your throat and upper airways can grow back and start to function again. Cilia are tiny cells that assist with clearing mucous from the airways and help you to breathe properly.Lung regeneration after smoking usually occurs from one month after quitting until about nine months after quitting. In recent years, there has been a lot of research into growing lungs artificially.ilia are tiny cells that assist with clearing mucous from the airways and help you to breathe properly. Lung regeneration after smoking usually occurs from one month after quitting until about nine months after quitting.