Hemoptysis, CT shadow is not necessarily bronchitis, may be bronchopneumonia, tuberculosis, lung tumors and other lung diseases, the specific diagnosis should be based on the patient’s symptoms comprehensive judgment. 1. Bronchitis: Bronchitis is an inflammation of the bronchial tubes caused by pathogenic microbial infection or chemical stimulation, and the main clinical symptoms are cough and sputum. Hemoptysis may occur when small blood vessels in the bronchial wall rupture due to severe coughing. However, bronchiectasis is usually not shown as a shadow in the lungs on chest CT, but only as a change in the texture of the lungs. 2. Bronchopneumonia: Bronchopneumonia can be characterized by cough, sputum, chest pain, dyspnea and other symptoms. If the inflammation involves blood vessels, hemoptysis may also be present. Chest CT of bronchopneumonia can show multiple exudate patchy shadows in the lungs. 3. Tuberculosis: Tuberculosis is a lung infection caused by Mycobacterium tuberculosis, and its main clinical symptoms are low-grade fever, night sweats, fatigue, dry cough, and hemoptysis. Chest CT after tuberculosis infection can show various manifestations such as cloudy shadow in the lung, nodular shadow in the lung, cavity in the lung and so on. 4. Lung tumor: lung cancer patients’ cancer cell clusters gather in the lungs will form CT shadows, and there are burrs around the border. Tumor compression of blood vessels or invasion of blood vessels can easily lead to blood vessel rupture and bleeding, so hemoptysis symptoms often occur. There are many diseases that can be considered by patients with hemoptysis and CT shadow, which do not have obvious specificity, but they should go to the hospital immediately for clear diagnosis and further treatment to avoid delaying the disease.