Most respiratory diseases have coughing and sputum symptoms. Sputum can be grayish-white mucus sputum or yellowish-green pus sputum, and sometimes coughing up sputum with bright red blood is called hemoptysis. In medicine, bleeding from the trachea, bronchus or lung tissue below the larynx that is expelled through coughing is called hemoptysis. So. What are the examination methods for spitting blood sputum? 1. Medical history Ask whether the bleeding is the first time or repeatedly if it is repeatedly, and whether it is different from the past. Tuberculosis should be considered in young adults with coughing and hemoptysis accompanied by low fever. People above middle age, especially male smokers, should pay attention to the possibility of lung cancer; careful inquiry and observation of the amount and color of hemoptysis, the presence of sputum, and personal history should pay attention to the history of exposure to tuberculosis, the history of menstruation, the history of occupational exposure to dust, the history of raw crabs and mayflies, etc. Hemoptysis with chest pain is most often seen in pulmonary infarction pneumococcal pneumonia. Hemoptysis with choking cough is mostly seen in bronchial lung cancer, mycoplasma pneumonia ktk knocking blood sputum is seen in lung abscess. Large amounts of hemoptysis are mostly seen in cavitary tuberculosis, bronchial dilatation aneurysm rupture, etc. 2, physical examination: patients with hemoptysis should do careful and repeated chest examinations some chronic heart and lung diseases can and disobedient fingers (toes), patients with progressive tuberculosis and lung cancer often have significant weight loss some blood disorders suffer from a general bleeding tendency. 3.Laboratory examination Sputum examination helps to find mycobacterium tuberculosis fungi, bacteria, cancer cells parasite eggs, heart failure cells, etc. Bleeding time clotting time, prothrombin time platelet count and other tests help to diagnose bleeding disorders. Red blood cell count and proerythrocyte determination help infer the degree of bleeding, and eosinophilia suggests the possibility of parasitic disease. 4.Device examination X-ray examination: X-ray examination, chest fluoroscopy, chest plain film body layer photography should be done in all patients with hemoptysis, and bronchography can be done to assist in diagnosis if necessary. CT examination: It helps to detect small bleeding lesions. Bronchoscopy: Patients with unexplained hemoptysis or bronchial obstruction with pulmonary atelectasis should consider bronchoscopy, such as tumors, tuberculosis foreign bodies, etc., while taking biopsies for pathological examination or foreign body removal, bleeding and sputum aspiration on the same direct view. Radioactive radionuclide gallium examination: it helps in the differential diagnosis of lung cancer and other masses in the lung. Blood spit out through the mouth is not always hemoptysis. Hemoptysis should be distinguished from oral or nasal bleeding or vomiting blood from the upper gastrointestinal tract. Blood from the mouth is often mixed with saliva, and examination of the oral cavity can reveal bleeding places, so differential diagnosis is generally not difficult. Careful examination of the nasal cavity is required to detect lesions and bleeding spots. It is sometimes difficult to distinguish vomiting blood from hemoptysis. Before vomiting blood, there is often nausea and upper abdominal discomfort, and the vomitus may be mixed with food, and after vomiting blood, there is often black stool.