Coughing with blood must be actively seen in the hospital to further clarify the diagnosis and rule out some potentially more serious diseases, as follows: 1. Tuberculosis, tuberculosis can be manifested as coughing with blood in the sputum, and can also have symptoms related to low fever and night sweats in the afternoon, and need to check the chest CT for auxiliary diagnosis. If the chest CT suspects TB, it is also necessary to do sputum antacid staining, PPD skin test, T-spoT and other related tests to further clarify the diagnosis of TB. In addition to the above symptoms, lung cancer can also manifest as hoarseness, chest pain, wasting and other related manifestations, which require chest CT and fiber bronchoscopy to further clarify the diagnosis, and sometimes lung aspiration biopsy to further confirm the diagnosis. 3, bronchial dilatation is also the cause of blood in sputum, bronchial dilatation needs to do chest CT to further clarify the diagnosis. 4.Pneumonia and bronchitis may also lead to blood in sputum, although it is relatively rare for pneumonia or bronchitis to lead to coughing up blood in sputum, but it can be encountered.