Generally speaking, coughing up dark red blood after lung cancer surgery is relatively normal.
During lung cancer surgery, some bronchial tubes and mucous membrane tissues will be damaged to a certain extent, therefore, it is normal to cough up sputum with a small amount of dark red blood, which can be gradually relieved with the relief of congestion of mucous membrane tissues and the recovery of the body itself.
However, if you keep coughing up a large amount of blood in the sputum, you need to take certain treatment measures, such as taking antiemetic drugs, fiberoptic bronchoscopy, etc., in order to prevent continuous infection or damage to the lungs, but we recommend that you consult with a professional doctor and do not use medication on your own.