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Acute and Chronic Bronchitis

Bronchitis is a common lung condition that causes inflammation of the bronchial tubes, the airways that carry air in and out of your lungs. It can affect people of all ages and range from mild to severe. 

At Banner Health, we help you recognize bronchitis symptoms early and take steps to protect your breathing health. 

What is bronchitis?

Bronchitis occurs when the bronchial tubes become inflamed and swollen. This inflammation narrows the airways and increases mucus production, leading to coughing and breathing discomfort. 

There are two main types: 

  • Acute bronchitis – short-term inflammation, usually caused by a viral infection 
  • Chronic bronchitis – long-term inflammation that is one form of chronic obstructive pulmonary disease (COPD) 

What causes bronchitis? 

Acute bronchitis 

Acute bronchitis is most often caused by viruses. It commonly develops after: 

  • A cold 
  • Influenza (flu) 
  • Respiratory syncytial virus (RSV) 
  • COVID-19 

Because it is usually viral, antibiotics are rarely needed. 

Chronic bronchitis 

Chronic bronchitis is defined as a productive cough that lasts at least three months per year for two consecutive years. 

It is most commonly caused by long-term exposure to lung irritants, including: 

  • Cigarette smoking 
  • Secondhand smoke 
  • Air pollution 
  • Workplace dust or chemical exposure 

People with asthma, cystic fibrosis, COPD or GERD may also be at higher risk. 

What are the symptoms of bronchitis? 

Common symptoms include: 

  • Persistent cough, often producing mucus 
  • Chest tightness or discomfort 
  • Wheezing 
  • Shortness of breath 
  • Fatigue 
  • Mild fever (usually 100.4°F or lower) 
  • Sore throat 

Acute bronchitis usually improves within two to three weeks, although a cough may linger for several weeks. 

When to see a doctor 

Contact a health care provider if you have: 

  • A cough lasting longer than three weeks 
  • Coughing up blood 
  • Fever higher than 100.4°F 
  • Worsening shortness of breath 
  • Severe wheezing 
  • Symptoms that improve and then return worse 

Young children, older adults and people with chronic lung conditions are at higher risk for complications. 

Is bronchitis contagious? 

Bronchitis itself is not contagious. However, the viruses that cause acute bronchitis can spread through: 

  • Coughing or sneezing 
  • Close contact 
  • Touching contaminated surfaces 

Chronic bronchitis is not contagious because it is caused by long-term irritation, not infection. 

If you have acute bronchitis, wash your hands frequently, cover your coughs and stay home while sick to reduce the spread of infection. 

How is bronchitis diagnosed? 

Your provider will review your symptoms and listen to your lungs for wheezing or crackling sounds. 

They may order tests such as: 

  • A chest X-ray to rule out pneumonia 
  • A nasal swab to test for flu or COVID-19 
  • Lung function tests to assess breathing 
  • Sputum testing if bacterial infection is suspected 
  • Blood tests if needed 

How is bronchitis treated? 

Treatment depends on whether the condition is acute or chronic. 

Acute bronchitis treatment 

Most cases improve on their own. To ease symptoms: 

  • Rest and stay home while recovering 
  • Drink fluids to thin mucus 
  • Use a humidifier 
  • Take over-the-counter pain relievers for fever or discomfort 
  • Use cough medicine cautiously 

Do not give over-the-counter cough or cold medicine to children under 4 years old. Ask your child’s provider what is safe. 

A cough may last three to six weeks even after the infection improves. 

Chronic bronchitis treatment 

The goal is to reduce symptoms and prevent flare-ups. 

Treatment may include: 

  • Quitting smoking 
  • Inhalers or bronchodilators 
  • Corticosteroids 
  • Pulmonary rehabilitation 
  • Oxygen therapy if needed 

Chronic bronchitis is one type of COPD. Learn more about COPD and long-term lung care

Should I take antibiotics for bronchitis? 

Antibiotics do not treat viral infections. Since most cases of acute bronchitis are viral, antibiotics are usually not recommended. 

Unnecessary antibiotics can lead to side effects and antibiotic resistance. 

If bacterial infection is suspected, your provider will determine whether antibiotics are appropriate. 

How long does bronchitis last? 

  • Acute bronchitis usually improves within two to three weeks. 
  • A cough may linger for up to six weeks. 
  • Chronic bronchitis is ongoing and may flare up periodically. 

If symptoms persist or worsen, seek medical care. 

How to prevent bronchitis 

You can lower your risk by: 

  • Not smoking and avoiding secondhand smoke 
  • Limiting exposure to pollution and dust 
  • Washing your hands regularly 
  • Staying up to date on flu, RSV, COVID-19 and pneumonia vaccines 
  • Maintaining a healthy lifestyle with regular exercise and balanced nutrition 

Bronchitis can be uncomfortable, but early care and healthy habits make a difference. If you have ongoing cough, breathing problems or concerns about bronchitis, schedule an appointment with a Banner Health provider.