Initially<unk>  may be asymptomatic or some patients do not experience symptoms at all. In a progressive<unk>  case symptoms include: * shortness of breath * a cough * mucus build up * stridor (a wheeze-like sound on breathing out) * difficulty in breathing * bluish coloration to skin around the nose and mouth * Chronic cough Symptoms may become worse if the patient is stressed, sick, lying down, or forcing a cough.
Tracheobronchomalacia
Chronic obstructive pulmonary disease
Bronchomalacia
Bronchiectasis
Tracheomalacia
Lung cancer
Tracheal tumor
Asthma