We are no strangers to spitting blood, but for hemoptysis, many people may not understand what is called hemoptysis. There are always people who think that this hemoptysis and vomiting blood, are bleeding from the mouth, in fact, they are different, from the etiology, hemoptysis generally refers to the whistle system diseases, vomiting blood its cause is largely due to digestive disorders caused by. In this case, it is not difficult to distinguish the difference between hemoptysis and hematemesis. Then what kind of diseases will appear hemoptysis? I believe this is also a question of concern. Through years of medical research, medical workers have summarized several types of diseases that cause hemoptysis. They are: 1, lung diseases cause hemoptysis lung diseases are mainly tuberculosis, acute lung abscess, chronic lung abscess, pneumonia, pulmonary fungal disease, pulmonary parasitic disease, pulmonary stasis, lung metastasis of malignant tumors, lung cysts, pneumoconiosis, etc.. 2.Bronchial diseases The bronchial diseases that cause hemoptysis mainly include bronchial dilatation, chronic bronchitis, endobronchial tuberculosis, benign bronchoma, bronchial stone, bronchial non-specific ulcers and so on. 3.Cardiovascular diseases The cardiovascular diseases that cause hemoptysis mainly include rheumatic heart disease, such as mitral stenosis, pulmonary embolism, pulmonary hypertension, aortic aneurysm, hypertensive heart disease, coronary heart disease, pulmonary arteriovenous fistula and so on. 4, blood diseases cause hemoptysis of blood diseases, mainly thrombocytopenic purpura, leukemia, hemophilia, aplastic anemia, disseminated intravascular coagulation and so on. 5.Systemic diseases The systemic diseases that cause hemoptysis are mainly acute infectious diseases, such as pulmonary hemorrhagic leptospirosis, epidemic hemorrhagic fever, pneumonic plague. 6, trauma, which is also a common cause of hemoptysis, mainly chest trauma, contusion, rib fracture, gunshot wounds, explosive injuries, medical operations (thoracentesis, lung puncture, lung biopsy, bronchoscopy, etc.) caused by hemoptysis and so on. 7.Connective tissue diseases that cause hemoptysis mainly include polyarteritis nodosa, leukosis, systemic lupus erythematosus, etc. 8, other diseases like uremia, pulmonary hemorrhage – nephritis syndrome and so on. It can be seen that the diseases that cause hemoptysis are so complicated that it is impossible to tell from the symptoms of hemoptysis without doing professional tests.