Bronchitis is when the bronchial tubes, which carry air to your lungs, become inflamed. This inflammation causes increased mucus production, leading to coughing and difficulty breathing. There are two main types:

• Acute Bronchitis: Usually caused by viruses (like those causing colds or flu) and symptoms typically last a few weeks.

• Chronic Bronchitis: A long-term condition, often linked to smoking, and is a type of COPD. It's defined by a persistent cough with mucus for at least three months a year for two years in a row. Common symptoms for both include a persistent cough (often with mucus), chest discomfort, shortness of breath, and fatigue. Viruses are the main cause of acute cases, while smoking is the primary driver of chronic bronchitis. Diagnosis relies on a physical exam and symptom history, sometimes supported by chest X-rays or lung function tests, especially for chronic cases.