Bronchiolitis in Children: Causes, Symptoms & When to Seek Care
Bronchiolitis is a common respiratory infection that affects the small airways (bronchioles) in young children, most often under age 2. It’s typically caused by a virus—most commonly respiratory syncytial virus (RSV)—and leads to inflammation, mucus buildup, and difficulty breathing. While most children recover at home with supportive care, bronchiolitis can be serious, especially for infants, premature babies, or children with underlying health conditions.
This article explains the symptoms of bronchiolitis, how it differs from other coughs and colds, and what to watch for if your child is struggling to breathe. We’ll also cover home remedies that help, signs it’s time to call the doctor, and what to expect if your child needs medical attention. With the right support, most kids bounce back within a week or two.
About This Resource
Coughing, wheezing, and labored breathing in a baby can be frightening. This guide was written for concerned parents looking for clarity and direction.
What Is Bronchiolitis?
Bronchiolitis is a viral infection that causes inflammation and congestion in the tiny airways of the lungs. It primarily affects infants and young toddlers, whose airways are narrower and more easily blocked. While several viruses can cause bronchiolitis—including RSV, rhinovirus, and influenza—RSV is the most common and often peaks in winter months.
Unlike bronchitis, which affects larger airways and is more common in older children and adults, bronchiolitis targets the smaller tubes deep in the lungs, making breathing more labored for small children.
Common Symptoms in Infants and Toddlers
Stuffy Nose and Cough
Bronchiolitis usually starts like a typical cold, with nasal congestion, runny nose, and mild cough. Over a few days, symptoms may worsen as mucus thickens and airways become inflamed.
Wheezing and Noisy Breathing
Wheezing—a high-pitched, whistling sound heard during exhaling—is a hallmark symptom. You may notice your child’s chest moving more rapidly or their ribs pulling in with each breath.
Fast or Difficult Breathing
Some children breathe quickly, grunt, or use extra chest and belly muscles to breathe. Their nostrils may flare, and feeding may become more difficult due to shortness of breath.
Trouble Feeding or Sleeping
Because breathing is harder, babies may become too tired to nurse or drink from a bottle. They may also have trouble sleeping and seem more irritable than usual.
Fever
A mild fever (100–102°F) often accompanies bronchiolitis, but it’s not always present. In some cases, the virus causes low-grade or no fever at all.
Causes and Risk Factors
Bronchiolitis spreads through respiratory droplets—like when someone sneezes or coughs—and by touching contaminated surfaces. Daycares, siblings, or crowded indoor settings can increase exposure.
Risk factors include:
Age under 6 months
Premature birth
Chronic lung or heart conditions
Weak immune systems
Exposure to cigarette smoke
Because their immune systems are still developing, babies are especially vulnerable to complications.
How Bronchiolitis Is Diagnosed
Diagnosis is typically based on physical symptoms and a clinical exam. Your pediatrician will listen to your child’s lungs and observe their breathing patterns. Tests are usually not needed unless symptoms are severe or the child is at high risk.
In some cases, a nasal swab may be used to identify the virus, or a chest X-ray may be ordered if pneumonia is suspected. Pulse oximetry may also be used to check oxygen levels in the blood.
Treatment Options
There is no specific antiviral medication for bronchiolitis; treatment focuses on supportive care and keeping your child comfortable while the virus runs its course.
Home Care Tips:
Use a cool-mist humidifier to keep air moist and ease congestion.
Offer frequent, small feedings to prevent dehydration.
Use nasal saline drops and a suction bulb to clear the nose before feeding or sleeping.
Keep your child upright as much as possible—gravity helps with breathing and mucus drainage.
Ensure plenty of rest and monitor for worsening symptoms.
Avoid over-the-counter cold medicines for children under age 4, unless advised by your doctor.
When Medical Care Is Needed:
Seek medical attention if your child:
Has trouble breathing or is breathing very fast
Is unable to eat or drink
Is dehydrated (fewer wet diapers, dry mouth, no tears when crying)
Has bluish lips or fingernails
Is excessively sleepy or difficult to wake
Some children—especially infants under 2 months—may need hospital care for oxygen support, IV fluids, or closer monitoring.
Recovery and Prevention
Most children recover within 1 to 2 weeks. The cough may linger longer but gradually improves. Children who’ve had bronchiolitis may be more prone to wheezing or asthma-like symptoms later in childhood, though not always.
To prevent bronchiolitis:
Wash hands frequently
Avoid close contact with sick people
Clean toys and surfaces often
Keep babies away from tobacco smoke
Limit exposure during RSV season
For high-risk babies, a preventive antibody treatment called nirsevimab (or Synagis, in some cases) may be offered during RSV season.
FAQs
Is bronchiolitis contagious?
Yes. It’s caused by a virus and spreads through coughs, sneezes, and contaminated surfaces.
Can my baby get bronchiolitis more than once?
Yes. Children can get bronchiolitis multiple times, especially during the first two years of life.
Is bronchiolitis the same as RSV?
RSV is the most common cause of bronchiolitis, but other viruses can also lead to the same symptoms.
When should I worry about wheezing?
If wheezing is accompanied by fast breathing, blue lips, or difficulty feeding, it’s time to call your doctor.
