Bronchitis is a condition that affects the airways of the lungs. It is an inflammation of the bronchi, which are the tubes that carry air to and from the lungs. When bronchitis occurs, the bronchi swell and become narrower, making it more difficult for air to pass through. Bronchitis can be either acute or chronic. Acute bronchitis usually lasts a few weeks, while chronic bronchitis can last for months or even years.
What Causes Bronchitis?
Bronchitis is usually caused by a virus, such as the common cold or flu. In some cases, it can be caused by a bacterial infection, such as strep throat. Other causes of bronchitis include smoking, air pollution, and exposure to secondhand smoke.
How Does Bronchitis Usually Start?
Bronchitis usually begins with a dry cough, which can progress to a productive cough with yellow or green mucus. Other symptoms of bronchitis include chest pain, shortness of breath, wheezing, fatigue, and fever. If the bronchitis is caused by a virus, the symptoms may last for a few days. If the bronchitis is caused by a bacterial infection, antibiotics may be necessary to clear the infection.