Dry, hacking cough is common at > 8000ft (~2500m)
Purulent<unk> /painful<unk>  common with prolonged periods at extreme altitude
Severe coughing spasms can result in cough fracture of ribs
May be confused with HAPE
High altitude pharyngitis and bronchitis
Acute mountain sickness
High altitude peripheral edema
Chronic mountain sickness
Multisystem inflammatory syndrome in children
High altitude cerebral edema
Aspiration pneumonia and pneumonitis
High altitude pulmonary edema