Acute bronchitis is an inflammation of the bronchial tubes, which carry air to and from the lungs. It is often caused by viral infections, such as the common cold or influenza, and can also result from exposure to irritants like smoke or pollution. Symptoms typically include a persistent cough, mucus production, wheezing, and chest discomfort. Most cases of acute bronchitis resolve on their own within a few weeks. Treatment focuses on relieving symptoms and may include rest, fluids, and over-the-counter medications. In some cases, a healthcare provider may prescribe bronchodilators or cough suppressants to help manage symptoms.