Spitting black sputum after quitting smoking is usually the product of destruction of red blood cells, which may be caused by pneumonia, bronchial dilatation and lung cancer.
1. Pneumonia: when lung infection occurs, there can be symptoms such as coughing, coughing up sputum, fever, etc., and some of them can have capillary rupture, which can cause the manifestation of black sputum.
2. Bronchial dilatation: manifested as chronic cough, coughing up sputum, when combined with infection, hemoptysis symptoms can occur, manifested as black sputum.
3. Lung cancer: tobacco is an important risk factor for lung cancer, if there is black sputum after quitting smoking, accompanied by cough, chest pain, progressive dyspnea, weight loss and other symptoms, the possibility of lung cancer cannot be excluded.
If there are other causes of black sputum after quitting smoking, such as bleeding in the respiratory tract or inhalation of dust, it is recommended to consult a doctor as soon as possible to find out the causes and treat them accordingly, so as not to delay the condition.