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Most cases of acute bronchitis go away in 2 to 3 weeks, but some may last 4 weeks. Home treatment to relieve symptoms is usually all that you need. Here are some things you can try that may help you feel better:
ANSWER: Acute bronchitis can last up to 90 days. Acute bronchitis is predominantly caused by viruses. Even after the virus has resolved, the irritation that it may have caused on the lining of the bronchial tubes can still cause symptoms to linger. [1]