Coughing up blood generally refers to hemoptysis, which is mainly seen in pathological conditions such as respiratory system diseases and cardiovascular system diseases, and usually cannot be cured by itself and requires systematic diagnosis and treatment. If hemoptysis is combined with coughing, coughing up purulent sputum, pestle finger and other symptoms, it is considered that it may be a respiratory disease such as bronchiectasis. The course of the disease is long, and sensitive antibiotic treatment, such as cefoperazone, etc.; if the amount of hemoptysis is large, surgical treatment, such as bronchial artery embolization, may also be required. If hemoptysis is combined with cough, chest tightness, dyspnea and other symptoms, and the hemoptysis is dark red sticky sputum, etc., it is considered that it may be mitral stenosis and other cardiovascular diseases. Its treatment includes etiologic treatment, such as benzylpenicillin anti-rheumatic fever; complication management, such as esmolol treatment of atrial fibrillation, warfarin to prevent embolism, etc.; also can take percutaneous balloon mitral valvuloplasty and other surgical treatment. Hemoptysis can also be seen in other diseases, such as tuberculosis, lung tumors, etc., need to take symptomatic treatment, such as anti-tuberculosis treatment, surgical treatment, it is recommended to consult the doctor as soon as possible, under the guidance of the physician reasonable treatment.