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Bronchitis usually gets better on its own. But if you have a very bad cough with other symptoms like a high temperature, you should go back to your doctor.

Your cough should clear up in about seven to 10 days.¹

But some people find it lasts longer. In one study, half the people had a cough that lasted for up to three weeks.² A quarter had a cough for over a month.²

It's a good idea to see a doctor if you have a cough that lasts for more than two weeks, or if you're worried about your symptoms.

We're not sure how often acute bronchitis leads to more serious lung diseases, such as chronic bronchitis or pneumonia.

• One large study of people who went to their doctors with coughs found that, within a month, a fifth of people had gone back to their doctor with the same symptoms.³
• Another study found that a third of adults with acute bronchitis went on to get symptoms of chronic bronchitis or asthma within three years.⁴ But we can't be sure if the original attack of bronchitis caused these conditions, or whether some people are just prone to lung disease.

Some other conditions can be made worse by bronchitis. For example, if you have asthma, chronic obstructive pulmonary disease (COPD) or heart disease, your condition can be made worse by bronchitis. You should see your doctor if your underlying condition becomes worse. Your doctor may need to adjust your usual treatment to help.

This information is for educational use only, and is not a substitute for prompt professional medical advice. Readers should always consult a physician or other professional for advice and treatment. ©BMJ Publishing Group Limited 2008. All rights reserved.