Spit a little black may be inhaled too much dust or coughing up blood caused, if the patient is caused by inhaling too much dust, avoid further inhalation of dust can be. However, if the patient coughs up blood, you need to actively consult a doctor, complete the relevant examination, to clarify what kind of disease caused by coughing up blood, and make targeted treatment. Clinical diseases that can cause coughing up blood include tuberculosis, lung tumors, bronchiectasis and so on. If the patient’s coughing up blood is caused by tuberculosis, anti-tuberculosis treatment is needed, and commonly used drugs include isoniazid, rifampicin, pyrazinamide, streptomycin, etc. If the patient’s coughing up blood is caused by pulmonary tuberculosis, anti-tuberculosis treatment is needed. If the patient’s coughing up blood is due to a lung tumor, surgical treatment, radiotherapy, chemotherapy, or treatment with target cell drugs can be considered. If the patient is coughing up blood due to bronchial dilatation, comprehensive treatment such as anti-infection, expectoration, asthma and hemostasis is needed.