Question: what is the difference between asthma chronic bronchitis and emphysema?
Answer: Emphysema happens when the tiny sacs in your lungs (called alveoli) are damaged. Chronic bronchitis is when the tubes that carry air to your lungs (bronchial tubes) get inflamed. Smoking is the most common cause of those conditions (and COPD). Some people have asthma and COPD at the same time.