Bronchiectasis refers to the deformation and persistent dilation of the bronchi due to various inflammations and fibrosis in the patient's bronchi and surrounding lung tissue, which destroys the surrounding muscles and elastic tissues. Bronchiectasis is treatable, and usually, symptomatic treatment and fundamental treatment targeting the cause can be employed. Symptomatic treatment involves anti-infection treatment for infections caused by the dilation. If the patient produces a large amount of phlegm, treatments to facilitate expectoration can be given. Additionally, if the patient's dilated bronchi repeatedly cause coughing, expectoration, and hemoptysis, and if internal medical treatment is ineffective, part of the dilated bronchi can be surgically removed to achieve therapeutic goals.