Coughing with blood is mainly caused by respiratory diseases, with inflammation of the throat, bronchitis, pneumonia, lung cancer, tuberculosis, and bronchial dilatation all possibly causing this symptom. If it is accompanied by low fever, night sweats, coughing and coughing up blood, it is mainly considered to be caused by tuberculosis, so it is necessary to go to the hospital for a film examination and a sputum tuberculin test. If the cough is rusty sputum, accompanied by fever, chills, and high fever, it is mainly caused by lobar pneumonia, and the blood picture is often higher. In the case of pink frothy sputum, most of the cases are caused by heart problems, and left heart failure can easily cause pulmonary stasis.