Patients with bronchiectasis often experience chest tightness, usually due to infections and a decline in lung function, so an initial effective pulmonary imaging examination is necessary. If an infection is present, actively controlling the infection can alleviate symptoms. Furthermore, lung function tests should be further refined. If there is concomitant ventilatory dysfunction and reduced lung function, inhaling bronchodilators or corticosteroids can improve symptoms. Since bronchiectasis is incurable once diagnosed, effective prevention is also very important. In summary, the causes of chest tightness in bronchiectasis are infections and decreased lung function.