The main change in the lungs when you quit smoking is that the damaged tissues in the lungs gradually repair themselves, reducing the risk of inflammation in the respiratory system and also being able to reduce the risk of lung cancer. It is well known that smoking causes damage to the lungs, and this damage is not irreversible. If you quit smoking earlier and for a longer period of time, the cilia function in the airways gradually recovers, accelerating the removal of mucus secretions. The color of the lungs has turned black due to long-term smoking and will fade after quitting. Smoking on the bronchial respiratory tract have a certain damage, after quitting these long-term stimulation disappears, the inflammation of the lungs will be reduced, the patient coughing, coughing sputum frequency will be reduced accordingly, in addition to long-term smoking cessation will let the lungs accumulate tar and nicotine gradually discharged, reducing the risk of lung cancer. Quitting smoking is good for the human body, and it is recommended to stick to it.