Bronchitis
Bronchitis is an inflammation of the airways leading into your lungs.
When your airways (trachea and bronchi) get irritated, they swell up and fill with mucus, causing you to cough. Your cough can last days to a couple of weeks. It’s the main symptom of bronchitis.
Viruses are the most common cause of acute bronchitis. Smoke and other irritants can cause acute and chronic bronchitis.
Symptoms and Causes
You might have other symptoms, including:
Shortness of breath (dyspnea).
Fever.
Runny nose.
Tiredness (fatigue).