Do I Have Bronchitis? Bronchitis is an inflammation of the lining of the bronchial tubes which carry air to the lungs. It can turn a simple cough into a frustrating and uncomfortable experience. Often associated with a bad cold, understanding the causes and available treatment options is crucial for effective management. Common Bronchitis Symptoms Cough Production of mucus (sputum), which can be clear, white, yellowish-gray, or green in color—rarely, it may be streaked with ...