Question: What is (are) Bronchiolitis obliterans ?
Answer: Bronchiolitis obliterans is an inflammatory obstruction of the lung's tiniest airways, the bronchioles. The bronchioles may become damaged and inflamed after inhalation of toxic fumes, as a result of respiratory infections, in association with connective tissue disorders, or after bone marrow or heart-lung transplants. This leads to extensive scarring that blocks the airways, leading to a dry cough, shortness of breath, fatigue and wheezing in the absence of a cold or asthma. While there is no way to reverse the disease, treatments are available to stabilize or slow the progression. Another similarly named disease, bronchiolitis obliterans organizing pneumonia, is a completely different disease.
Source: GARD

Question: What are the treatments for Bronchiolitis obliterans ?
Answer: How might bronchiolitis obliterans be treated? While there is no cure for this condition, treatment with corticosteroids can help to stabilize or slow its progression. Immunosuppressive therapies and lung transplants might also be used. Treatment is most effective during the early stages of the disease. If left untreated, bronchiolitis obliterans can be fatal.
Source: GARD