Bronchiolitis Obliterans is a rare and serious lung condition that affects the small airways, known as bronchioles. It occurs when these airways become inflamed and scarred, leading to obstruction and difficulty breathing. This condition can result from various causes, including infections, exposure to harmful chemicals, or autoimmune diseases. Symptoms of Bronchiolitis Obliterans may include a persistent cough, wheezing, and shortness of breath. Diagnosis typically involves imaging tests and lung function tests. Treatment focuses on managing symptoms and may include medications to reduce inflammation or improve breathing, but the condition can lead to long-term respiratory issues.