Hemoptysis is a common respiratory symptom that refers to the discharge of blood from the mouth through coughing. Hemoptysis occurs in all age groups, but the disease varies. The common cause of hemoptysis in middle-aged and elderly people is lung tumors, while in young people hemoptysis is more common in bronchiectasis. Bronchiectasis, or bronchiectasis for short, is a disease caused by abnormal expansion of the airways and occurs in young people between the ages of 20 and 30. Some patients do not have cough and sputum, but only have recurrent hemoptysis, which is also called “dry bronchiectasis”, while those who have more cough and sputum are called “wet bronchiectasis”. If the disease is prolonged, wheezing and dyspnea may gradually appear, progressing to respiratory failure, airway obstruction, emphysema, pulmonary heart disease and other serious complications. Patients may have suffered from measles, tuberculosis, or pneumonia in their early years, which are not completely cured. The inflammation of the airway wall is prolonged, destroying the airway scaffolding structure and elastic fibers, resulting in airway dilation and inflammatory damage often involving blood vessels, leading to hemoptysis. Some young people are troubled, nervous, or even anxious and depressed by recurrent hemoptysis, worrying whether they are suffering from an incurable disease, and most of them can be diagnosed with bronchiectasis after going to the hospital for high-resolution chest CT examination (HRCT).