What are the main signs and symptoms of acute bronchitis?

Coughing, with or without mucus, is the predominant symptom of acute bronchitis. The cough usually lasts 10–20 days but may last up to 4 weeks, even after resolution of the primary infection itself. Chest discomfort, nasal congestion, mild shortness of breath, malaise, headache, and fatigue are other common symptoms.^[1]