- It is defined as inflammation of the small airways (bronchioles) of the lung.
- It is commonly seen in young children and infants and 70% of cases are of viral in origin.
- It is defined by localized, irreversible dilation (widening) of part of the bronchial tree causing the airways to become widen, flabby and scarred.
- In this the airways loses its ability to clear out mucus resulting in severe lung infections.
- Chronic Obstructive Pulmonary Disease (COPD) refers to a group of lung diseases that block airflow and cause difficulty in breathing.
- Emphysema and Chronic Bronchitis are the two most common conditions that make up COPD.
- They happen due to long-term exposure to substances that irritate and damage the lungs.
- Asthma is a common chronic inflammatory disease of the airways characterized by wheezing, coughing, chest tightness, and shortness of breath.
- The cause can be in a form of allergy called atopy, or can even be induced by exercise, cold climate and emotional stress.