Most people will spit black sputum after quitting smoking, but there is a small percentage of people who do not spit black sputum after quitting smoking, and the details vary from person to person. In most people, as the lung function recovers after quitting smoking, the cilia system on the surface of the respiratory tract gradually recovers, and the harmful substances deposited in the lungs, such as soot and tar, are discharged from the body by swinging, and mixed with sputum, it will be manifested as black sputum, and the color of the sputum will slowly change to white after a period of time. Whether or not you will spit black phlegm after quitting smoking is mainly related to the length of time you have been smoking and your physical condition. If you don’t spit after quitting smoking, it may be because you have been smoking for too long and need to recover slowly, or it may be because you have been smoking for a shorter period of time or you have a better physical condition, so you don’t have phlegm discharge phenomenon. Black sputum after quitting smoking is a normal physiological phenomenon, do not need to worry too much, if other abnormalities occur, it is recommended to consult a doctor in time to avoid delaying the condition.