Initial symptoms of<unk>  include shortness of breath (dyspnea), and dry cough. These may be worse after sudden exertion or when exposed to temperature change, which can resemble asthma, hyperventilation syndrome or pulmonary embolism. Chest pain (such as a tight chest), chills, crackly chest, and fever may also occur. Upon re-exposure to avian proteins, sensitized individuals typically experience symptoms within 4–8 hours. In chronic<unk> , symptoms may include anorexia, weight loss, extreme fatigue, and progressive pulmonary fibrosis. Pulmonary fibrosis is generally the most serious consequence of the disease, as it progressively and irreversibly diminishes the lungs' efficiency over time. As a result, sufferers may have repeated chest infections and ultimately struggle to breathe. Complications Pulmonary fibrosis can get worse over time. This can eventually lead to respiratory failure, which can be fatal. Diffuse alveolar damage (DAD) can occur with acute respiratory failure.
Bird fancier's lung
Farmer's lung
Metsovo lung
Underwood's septa
Saber-sheath trachea
Surfer's knots
World Trade Center lung
Fiddler's neck