Obstructive lung disease is a category of lung disease characterized by difficulty exhaling air from the lungs due to airway obstruction. Obstruction can be caused by many factors, including inflammation, mucus accumulation, bronchial constriction, or damage to lung tissue. Some common types of obstructive lung disease include asthma, chronic obstructive pulmonary disease (COPD) and bronchiectasis. Treatment for these diseases often includes medications that reduce inflammation and open the airways, O2 therapy, lifestyle changes such as quitting smoking, and avoiding environmental trigger. © 2023 by Nova Science Publishers, Inc. All rights reserved.