Whether bronchiectasis is dangerous depends on the extent of the patient's bronchiectasis and whether they have other comorbidities. If the patient's bronchiectasis is relatively limited and actively treated, they can still survive for a long time. Clinically, we often see elderly people in their seventies or eighties with bronchiectasis, but their medical history can often span decades and even trace back to childhood. In such cases, bronchiectasis does not pose a significant danger to their lifespan. However, if the bronchiectasis is more extensive and has damaged lung function, it can lead to respiratory failure, pulmonary heart disease, and other dangerous conditions, possibly resulting in death. Additionally, bronchiectasis can cause severe hemoptysis. If severe hemoptysis occurs suddenly, it is generally difficult to rescue in time, severely affecting their prognosis and can cause death within a short time, within minutes.