Most of the reasons for coughing up black and bloody sputum are due to respiratory damage caused by respiratory diseases.
The reason for the appearance of dark bloody sputum is the same as the reason for the appearance of bloody sputum or hemoptysis, which is due to respiratory diseases that lead to respiratory tract mucosal invasion, damage to capillaries or blood leakage into the alveoli.
After respiratory bleeding, if the amount of bleeding is small and the blood stays in the lungs for a longer period of time, then the blood may be black in color and be discharged with the sputum as dark bloody sputum. If the amount of bleeding is large, it will be manifested as hemoptysis or fresh blood in sputum.
Diseases that can cause black sputum include bronchiectasis, lung abscess, tuberculosis, lung cancer, pulmonary embolism, etc. It is usually necessary for the doctor to combine the patient’s other clinical symptoms with the corresponding examination to confirm the diagnosis.
Most of the black blood sputum is indicative of respiratory diseases, if you cough up black blood sputum, you need to go to the hospital in time for diagnosis and treatment.