Coughing and bleeding in the lungs is mainly considered to be caused by serious lung infection, commonly caused by lobar pneumonia, tuberculosis, tumors of the lungs, bronchial dilatation and other diseases. It is necessary to go to the hospital for examination, blood test for routine blood test, chest X-ray or CT lung test, and tuberculin test, and choose the appropriate treatment according to the test results. In the case of severe pneumonia, effective antibacterial medications can be used, cough suppressants and phlegm relievers are also needed, as well as various symptomatic supportive treatments. In case of tuberculosis, anti-tuberculosis drugs such as isoniazid, rifampin, streptomycin, etc. are needed. Most cases caused by lung cancer require surgery.