Types of Bronchitis

There are two main types of bronchitis:

• Acute bronchitis – a short-term infection that usually lasts about two to three weeks. It is most often caused by viruses that infect the airways. 
• • Chronic bronchitis – a long-term condition characterized by a productive cough with mucus on most days for at least three months of the year. Chronic bronchitis is commonly associated with chronic obstructive pulmonary disease (COPD). :contentReference[oaicite:0]{index=0}

Common Symptoms

Symptoms of bronchitis may include:

• persistent cough 
• mucus production
• wheezing or noisy breathing
• chest discomfort
• fatigue
• shortness of breath

Symptoms of acute bronchitis often begin similarly to a cold or other respiratory infection and may gradually progress to coughing with mucus or chest tightness. :contentReference[oaicite:1]{index=1}

Possible Causes

Most cases of acute bronchitis are caused by viruses that infect the airways. Exposure to lung irritants such as tobacco smoke, air pollution or chemical fumes may also contribute to airway inflammation and symptoms. :contentReference[oaicite:2]{index=2} 

References

Content adapted from information provided by the Canadian Lung Association:https://www.lung.ca/lung-health/lung-diseases/bronchitis