Acute bronchitis, sometimes referred to as a “chest cold,” is a common respiratory condition that occurs when the airways in your lungs (bronchi) become inflamed and produce excess mucus. While it’s usually caused by a viral infection, acute bronchitis can be uncomfortable and may interfere with daily activities if left untreated. Learning to recognize its early signs and knowing how to treat them can help you recover faster and avoid complications. For a same-day ...