Overview

Bronchiolitis is a viral infection that affects children younger than 2 years old. It causes the airways (bronchioles) in your child’s lungs to narrow, which makes breathing difficult. If your child develops this infection, you may notice they have symptoms similar to a common cold (runny nose, cough) in addition to noisy breathing (wheezing).

The infection is seasonal. It’s more likely to occur during the winter and early spring.

Bronchiolitis isn’t usually serious, but it can be. If your child develops this infection, monitor their breathing and contact a healthcare provider if they have trouble breathing.

How common is bronchiolitis?

Bronchiolitis is the most common lower respiratory tract infection among children younger than 2 years old.

Is bronchiolitis contagious?

The viruses that cause bronchiolitis are contagious. These viruses spread through respiratory droplets (saliva or mucus) from someone’s mouth or nose. When someone sneezes or coughs, these droplets become airborne and spread from person to person or stick to frequently touched surfaces or objects.

What is the difference between bronchiolitis and bronchitis?

Bronchiolitis and bronchitis are two conditions that both sound similar and have similar symptoms. A virus causes both conditions, which target the airways in your lungs. Bronchitis affects the bronchi, or the larger airways. Bronchiolitis affects your smaller airways (bronchioles). Bronchitis usually affects older children and adults, while bronchiolitis is more common in younger children.

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Symptoms

When to see a doctor

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Complications

Blood clots are a dangerous complication of atrial fibrillation (AFib). Blood clots can lead to stroke.
The risk of stroke from AFib increases as you grow older. Other health conditions also may increase the risk of a stroke due to AFib. These conditions include:
  • High blood pressure.
  • Diabetes.
  • Heart failure.
  • Some types of heart valve disease.
Blood thinners are commonly prescribed to prevent blood clots and strokes in people with atrial fibrillation.

Prevention

Healthy lifestyle choices can reduce the risk of heart disease and may prevent atrial fibrillation (AFib). Here are some basic heart-healthy tips:
  • Control high blood pressure, high cholesterol and diabetes.
  • Don't smoke or use tobacco.
  • Eat a diet that's low in salt and saturated fat.
  • Exercise at least 30 minutes a day on most days of the week unless your health care team says not to.
  • Get good sleep. Adults should aim for 7 to 9 hours daily.
  • Maintain a healthy weight.
  • Reduce and manage stress.


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