Bronchitis is when the airways in your lungs (bronchi) become inflamed. This makes it hard for air to flow in and out, leading to symptoms like coughing, fatigue, and shortness of breath.
Bronchitis is usually caused by a virus. But it can also be caused by environmental factors, like cigarette smoking and air pollution. And if you have a lingering cough or a “chest cold,” you might be wondering: Do I have bronchitis? If so, this quiz is a good place to start.