Coughing up blood is hemoptysis, hemoptysis is mostly caused by respiratory diseases, such as tuberculosis, lung abscess, lung cancer, bronchiectasis, etc., but also may involve the cardiovascular system, hematological diseases and other systemic diseases, the patient needs to be treated with medication for the primary disease. 1. Respiratory system diseases: for hemoptysis caused by tuberculosis, anti-tuberculosis drugs such as isoniazid, rifampicin and pyrazinamide are mainly used; for hemoptysis caused by bronchial dilatation, aminocyclic acid can be used to stop hemoptysis; penicillin can be used for antimicrobial treatment of lung abscess; and surgical resection is mainly adopted for lung cancer in case of lesion limitation. 2. Cardiovascular system lesions: the occurrence of hemoptysis is not to exclude the possibility of cardiovascular disease, patients can use phentolamine, procaine and other vasodilating drugs to achieve the purpose of hemostasis, the specific use of drugs or need to look at the actual condition. Hemoptysis may also be caused by other diseases, such as leukemia, epidemic hemorrhagic fever, systemic lupus erythematosus, hemoptysis can not be abused after the occurrence of drugs, must be in the case of a clear cause of the rational use of drugs.