Your baby starts with a runny nose.
Then the cough gets stronger.
Breathing sounds noisy.
Feeding takes longer.
You start watching every breath.
This can happen with bronchiolitis in babies.
Bronchiolitis is a common viral chest infection in babies and children under age 2.
It affects the smallest airways in the lungs.
RSV is the most common cause, but other viruses can cause it too.
Most children improve with simple supportive care.
Some babies need urgent medical help because breathing or feeding becomes difficult.
This guide explains bronchiolitis symptoms, RSV, safe home care, feeding, sleep safety, hospital treatment, prevention, and the warning signs parents should never ignore.
For the full health library, visit our Child Health and Safety Guide.
For more common infections, see Childhood Illnesses 101.
Quick Answer
Bronchiolitis usually starts like a cold, then may cause cough, fast breathing, wheezing, crackling sounds, and trouble feeding. Symptoms often get worst around days 3 to 5. Most babies recover at home with fluids, smaller feeds, nasal saline, gentle suction when needed, rest, and close watching. There is no medicine that cures routine bronchiolitis. Antibiotics do not treat the virus, and bronchodilators or steroids are not used routinely. Get emergency help for pauses in breathing, severe breathing trouble, blue or gray lips or skin, marked chest pulling, or a baby who is floppy or very hard to wake.
Important Medical Note
I am not a dermatologist or a doctor, and this content does not replace professional medical advice. What I share comes from real-life experience, extensive research, and consultation with healthcare providers. Always consult qualified medical professionals for diagnosis and treatment of any health condition.
What is bronchiolitis?
Bronchiolitis is an infection of the tiny airways in the lungs.
These airways are called bronchioles.
A virus makes them swollen.
Mucus also builds up.
This can make breathing harder.
Bronchiolitis mainly affects babies and children under age 2.
It is most common in the first year of life.
It is not the same as bronchitis.
Is bronchiolitis the same as RSV?
No.
RSV in babies is a virus.
Bronchiolitis is a condition that can be caused by RSV.
RSV is the most common cause.
Other viruses can also cause bronchiolitis.
That means a baby can have RSV without bronchiolitis.
A baby can also have bronchiolitis from another virus.
What are the first signs of bronchiolitis?
It often starts like a cold.
Early signs can include:
- Runny nose
- Blocked nose
- Sneezing
- Mild cough
- Lower appetite
- Mild fever or no fever
After one to three days, the cough may become stronger.
Breathing may become faster.
Feeding may become harder.
What are the main bronchiolitis symptoms?
Common bronchiolitis symptoms include:
- Persistent cough
- Fast breathing
- Wheezing
- Crackling sounds in the chest
- Chest pulling in with breaths
- Difficulty feeding
- Fewer wet diapers
- Irritability
- Lower activity
Very young babies may not show the usual pattern.
They may become sleepy.
They may feed less.
They may have pauses in breathing.
Some babies with RSV do not have a fever.
When are bronchiolitis symptoms usually worst?
Symptoms often peak around days 3 to 5.
This is why a baby who looked mildly sick on day 1 can look worse a few days later.
The cough can last around 3 weeks.
Do not expect every baby to follow the same exact timeline.
Which babies are more likely to become seriously ill?
Any baby can become very sick.
Risk is higher in some children.
These include:
- Very young infants
- Babies younger than 6 months
- Babies born prematurely
- Children with chronic lung disease
- Children with congenital heart disease
- Children with weakened immune systems
- Children with some neuromuscular conditions
- Children with severe cystic fibrosis
If your baby is in a higher risk group, call the healthcare professional early if breathing or feeding changes.
How can I tell if my baby is working hard to breathe?
Watch the chest and belly.
Signs of breathing difficulty in babies can include:
- Breathing much faster than normal
- Ribs pulling in with each breath
- Skin pulling in above the collarbone
- Grunting
- Head bobbing in a young infant
- Nostrils flaring
- Pauses in breathing
- Blue or gray lips or skin
Do not wait for wheezing if breathing already looks hard.
When is bronchiolitis an emergency?
Get emergency help now if your baby:
- Has severe trouble breathing
- Has pauses in breathing
- Has blue or gray lips, tongue, or skin
- Has marked chest pulling
- Is grunting with each breath
- Is floppy
- Will not wake or stay awake
- Looks seriously unwell
Use the emergency number for your country.
When should I call the doctor urgently?
Get medical advice quickly if:
- Breathing is getting faster
- Breathing looks harder than before
- Your baby is drinking much less than normal
- Your baby has far fewer wet diapers
- Your baby seems dehydrated
- Your baby is younger than 6 months and is getting worse
- Your baby is unusually tired or irritable
- Your baby has a chronic heart or lung condition
- You are worried about the way your baby looks or breathes
A baby younger than 3 months with a temperature of 38°C or 100.4°F or higher needs prompt medical evaluation.
For fever guidance, read our Childhood Fever Guide.
Can bronchiolitis be treated at home?
Often, yes.
Most babies with mild bronchiolitis can recover at home.
The main treatment is supportive care.
This means helping your baby drink, breathe through the nose, rest, and stay comfortable while the virus clears.
Safe bronchiolitis home care
Offer smaller feeds more often
Breathing and feeding use energy.
A baby with a blocked nose may tire before finishing a normal feed.
Offer smaller amounts more often.
For young babies, breast milk or formula should remain the main fluid.
Watch wet diapers.
Use nasal saline
Nasal saline can loosen mucus in a blocked nose.
This can make feeding easier.
Use plain saline made for babies or follow your healthcare professional's advice.
Use gentle nasal suction when needed
Gentle suction can help when mucus blocks the nose.
It can be useful before feeding.
Do not suction aggressively or constantly.
NICE does not recommend routine upper airway suction for every child.
It may be considered when upper airway mucus is causing feeding or breathing problems.
Keep your baby upright while awake
Holding your baby upright while awake can make feeding and comfort easier.
Take breaks during feeds.
Watch breathing closely.
This advice applies while your baby is awake and supervised.
Keep smoke away
Tobacco smoke can make coughing and wheezing worse.
Keep all smoke away from your baby.
Use a clean cool mist humidifier only if the air is dry
A cool mist humidifier may make dry air more comfortable.
Keep it clean.
Change the water as directed.
Do not use bowls of boiling water or hot steam around a baby.
How should a baby with bronchiolitis sleep?
This is one of the most important safety points.
Congestion does not change safe sleep rules.
Place your baby:
- On their back
- On a firm sleep surface
- On a flat sleep surface
- In an approved crib, bassinet, or play yard
- With no pillows, wedges, loose blankets, or positioners
Do not raise the head of the crib.
Do not put a towel under the mattress.
Do not use an inclined sleeper.
Do not use a car seat for routine naps at home.
If your baby falls asleep in a car seat during travel, move the baby to a firm, flat sleep surface when you reach your destination.
The AAP says babies should sleep on a firm, flat, noninclined surface even when they have a stuffy nose.
Should I hold my baby upright to sleep?
No.
You can hold your baby upright while awake.
But for sleep, use the normal safe sleep space.
Do not fall asleep while holding a baby on a sofa or armchair.
What should I feed a baby with bronchiolitis?
Keep feeding simple.
For young infants, continue breast milk or formula.
Offer smaller feeds more often.
Older babies can continue their normal age appropriate foods when they want them.
Do not force food.
Fluids matter most during a short illness.
What are signs of dehydration?
Watch for dehydration signs such as:
- Much fewer wet diapers
- Dry mouth
- No tears when crying
- Sunken eyes
- Unusual sleepiness
- Very poor feeding
If your baby cannot drink enough because breathing is too hard, get medical help.
Does bronchiolitis need antibiotics?
No, not for the bronchiolitis itself.
Bronchiolitis is caused by viruses.
Antibiotics treat bacteria.
They do not treat RSV or routine viral bronchiolitis.
A doctor may prescribe antibiotics only if a separate bacterial infection is found.
Do bronchodilators such as albuterol help bronchiolitis?
They are not recommended as routine treatment for typical bronchiolitis.
NICE guidance says not to use salbutamol routinely for bronchiolitis.
Some older articles and older clinical habits used bronchodilators more often.
Modern routine care focuses on breathing support, fluids, and observation.
If your child has another diagnosis such as asthma or recurrent wheezing, follow the plan given by your healthcare professional.
Do steroids help bronchiolitis?
Not routinely.
NICE says systemic and inhaled corticosteroids should not be used to treat routine bronchiolitis.
Does nebulized adrenaline help?
It is not recommended for routine bronchiolitis treatment.
NICE also advises against routine nebulized adrenaline.
Does chest physiotherapy help?
Not for most babies with routine bronchiolitis.
NICE says chest physiotherapy should not be used routinely unless a child has another condition that makes clearing mucus difficult.
Should I use cough medicine?
Do not give a young baby over-the-counter cough and cold medicine unless a qualified healthcare professional says it is appropriate.
These products do not treat bronchiolitis.
Some can be unsafe for young children.
Can I give honey for the cough?
Never give honey to a baby younger than 1 year.
Honey can cause infant botulism.
For a child older than 1 year, ask the healthcare professional if honey is appropriate for cough comfort.
What about fever medicine?
If your baby is uncomfortable, a healthcare professional may recommend an age appropriate pain or fever medicine.
Use the exact product and dose advised for your child's age and weight.
Do not give aspirin to a child.
Do not give a baby younger than 12 weeks fever medicine before medical evaluation unless a clinician specifically tells you to.
How is bronchiolitis diagnosed?
A healthcare professional usually diagnoses bronchiolitis from:
- The child's age
- The symptom pattern
- Breathing
- Chest sounds
- Feeding
- Oxygen level when needed
A chest X ray is not routinely needed.
NICE warns that X ray changes can look like pneumonia and may lead to unnecessary antibiotics.
Does my baby need an RSV test?
Not every baby needs an RSV test.
Bronchiolitis can often be diagnosed from the clinical picture.
A clinician may test when the result will help with hospital care, infection control, or another medical decision.
What happens if a baby needs hospital care?
Hospital treatment is still mainly supportive bronchiolitis care.
A baby may need:
- Oxygen
- Close breathing monitoring
- Fluids through a feeding tube
- Fluids through a vein
- More advanced breathing support in severe cases
Some babies need continuous positive airway pressure or mechanical ventilation.
This is for severe illness.
Most hospitalized children improve with supportive care.
When is oxygen used?
Doctors use oxygen when blood oxygen stays too low.
The exact threshold depends on age, underlying health conditions, and clinical guidance.
This decision belongs in a medical setting.
Home pulse oximeter numbers should not replace watching your baby's breathing, color, feeding, and alertness.
Why can home pulse oximeters be confusing?
Pulse oximeters can give wrong readings.
Movement matters.
Probe placement matters.
Cold hands and feet can affect readings.
Some devices can also be less accurate across different skin tones.
If your baby looks blue, has pauses in breathing, or is working hard to breathe, get help even if a home device shows a reassuring number.
How long does bronchiolitis last?
Symptoms often become worst around days 3 to 5.
Breathing may then slowly improve.
The cough can last around 3 weeks.
If the baby gets worse after starting to improve, call the doctor.
Can bronchiolitis come back?
A child can get bronchiolitis more than once because different viruses can cause it.
RSV infection also does not give perfect lifelong protection.
Some children wheeze again with later respiratory infections.
Does bronchiolitis cause asthma?
Children who have had bronchiolitis may be more likely to wheeze later.
Research has also found an association between severe RSV illness and later wheezing or asthma.
That does not mean bronchiolitis automatically causes asthma in every child.
Genetics, allergies, environment, and other factors also matter.
If wheezing keeps returning, ask your child's healthcare professional about other causes.
Bronchiolitis versus bronchitis
| Bronchiolitis | Bronchitis |
|---|---|
| Affects the smallest airways | Affects larger airways |
| Mainly babies and children under 2 | More common in older children and adults |
| Usually viral | Often viral |
| Wheezing and feeding trouble are common | Cough is often the main symptom |
Bronchiolitis versus pneumonia
Both can cause cough and fast breathing.
Pneumonia affects lung tissue.
Bronchiolitis affects the small airways.
A high fever, focal chest findings, severe illness, or other signs may make a clinician consider pneumonia.
Do not try to tell them apart from breathing rate alone.
For more, see our Pneumonia in Children Guide.
How can families reduce the spread of RSV?
Simple habits help.
- Wash hands before touching a baby.
- Keep sick visitors away from young babies.
- Cover coughs and sneezes.
- Clean frequently touched surfaces.
- Do not share cups or utensils during illness.
- Keep smoke away from the baby.
You cannot prevent every RSV infection.
What is the current RSV prevention advice for babies?
RSV prevention has changed in recent years.
In the United States, CDC recommends protecting infants from severe RSV disease with one of two main approaches:
- A maternal RSV vaccine during pregnancy
- A long acting RSV antibody for the infant
Most infants do not need both.
CDC currently lists nirsevimab and clesrovimab as long-acting infant RSV antibodies for eligible infants.
The right option depends on pregnancy vaccination, the baby's age, season, health, and local guidance.
Ask your prenatal or pediatric healthcare professional before RSV season.
Which babies may need an RSV antibody?
In current United States guidance, an infant RSV antibody is recommended for many babies younger than 8 months who are born during or entering their first RSV season when maternal vaccination did not provide protection.
Nirsevimab is also recommended for some children age 8 through 19 months who have a higher risk of severe RSV and are entering another RSV season.
Recommendations can change.
Use current local guidance.
Is an RSV antibody the same as a vaccine?
No.
The infant RSV products are monoclonal antibodies.
They give passive protection.
The maternal RSV product is a vaccine given during pregnancy.
Can breastfeeding prevent bronchiolitis?
Human milk has health benefits.
But breastfeeding does not guarantee that a baby will avoid RSV or bronchiolitis.
Do not blame yourself if a breastfed baby becomes ill.
Should I keep my baby out of daycare for the whole RSV season?
Not usually.
There is no universal recommendation that every healthy baby must stay out of daycare for an entire RSV season.
Families should use normal infection prevention, follow childcare illness rules, and ask the baby's healthcare professional about extra precautions if the baby is at high risk.
Can I travel with a baby during RSV season?
There is no universal rule to cancel all travel.
Think about your baby's age and health.
Avoid close contact with sick people.
Wash hands often.
Ask your child's healthcare professional if your baby is premature or has a high risk medical condition.
When can my child return to daycare?
Follow the daycare's illness policy.
Your child should be well enough to take part in normal activities.
Breathing and feeding should be manageable.
Fever rules vary by setting and country.
Do not use a fixed contagious period as the only rule.
What should parents track at home?
A short note can help.
Track:
- When symptoms started
- Breathing changes
- Feeding amount
- Wet diapers
- Temperature
- Vomiting
- Alertness
- Any pauses in breathing
This makes a phone call with the doctor clearer.
Common bronchiolitis myths
Myth: A baby should sleep elevated to breathe better
False.
Inclining a baby's sleep surface is unsafe.
Use a firm, flat sleep surface on the back.
Myth: A car seat is a safe place for bronchiolitis naps
False.
Car seats are for travel.
They are not a routine sleep space at home.
Myth: Bronchiolitis always needs a nebulizer
False.
Routine bronchodilator treatment is not recommended for typical bronchiolitis.
Myth: Antibiotics make bronchiolitis clear faster
False.
Bronchiolitis is viral.
Myth: Wheezing always means asthma
False.
Bronchiolitis can cause wheezing in babies.
Repeated wheezing may need further assessment.
My parenting perspective
After more than 33 years of parenting and grandparenting, I know how frightening noisy breathing can sound.
The instinct is to do something fast.
More medicine.
More steam.
A different sleep position.
But bronchiolitis taught me an important lesson.
More treatment is not always safer treatment.
The things that matter most are breathing, feeding, hydration, safe sleep, and knowing when to get help.
I also learned to watch the baby, not only the cough.
A baby who is working hard to breathe or cannot feed needs more attention than a baby who simply has a noisy nose.
My family experience shapes the practical side of this guide.
The medical guidance comes from current pediatric and public health sources.
Conclusion
Bronchiolitis in babies is common, but breathing problems in a young child should always be taken seriously.
Use simple supportive care.
Offer smaller feeds.
Use saline and gentle suction when needed.
Keep smoke away.
Follow safe sleep rules every time.
Do not rely on antibiotics, steroids, or bronchodilators for routine bronchiolitis.
Get urgent help for pauses in breathing, blue or gray color, severe breathing effort, dehydration, or a baby who is hard to wake.
Bookmark this guide now so you have a clear plan if bronchiolitis symptoms appear again.
Keep Reading on Parnthub
- Child Health and Safety Guide
- Childhood Illnesses 101
- Childhood Coughs
- Childhood Cold
- Pneumonia in Children
- Childhood Fever
- Complete Toddler Guide
References and Sources
- American Academy of Pediatrics, HealthyChildren: Treating Bronchiolitis in Infants
- Centers for Disease Control and Prevention: RSV in Infants and Young Children
- Centers for Disease Control and Prevention: RSV Immunization Guidance for Infants and Young Children
- NHS: Bronchiolitis
- NICE: Bronchiolitis in Children, Diagnosis and Management
About the Author
Adel Galal is the founder and primary author of Parnthub. He is a father of four and a grandfather of four, with more than 33 years of hands-on parenting and grandparenting experience.
His child health articles combine real family experience with careful research from pediatric, government, and public health sources. He focuses on the questions parents face in real life: what can be watched safely at home, what breathing signs matter, what common treatments do not help, and when a baby needs professional medical care.
I am not a dermatologist or a doctor, and this content does not replace professional medical advice. What I share comes from real life experience, extensive research, and consultation with healthcare providers. Always consult qualified medical professionals for diagnosis and treatment of any health condition.
Frequently Asked Questions About Bronchiolitis
What are the first signs of bronchiolitis in a baby?
Bronchiolitis often starts like a cold with a runny nose, blocked nose, mild cough, and lower appetite. After a few days, the cough may get worse and breathing may become faster or noisy.
What is the best treatment for bronchiolitis?
Most bronchiolitis treatment is supportive care. Offer smaller feeds, use nasal saline, use gentle suction when mucus blocks feeding or breathing, keep smoke away, and watch breathing and hydration closely.
Does bronchiolitis need antibiotics?
No. Bronchiolitis is caused by viruses, so antibiotics do not treat the illness. A doctor may use antibiotics only if a separate bacterial infection is diagnosed.
Should a baby with bronchiolitis sleep elevated?
No. Babies should sleep on their backs on a firm, flat, noninclined sleep surface. Do not raise the crib mattress, place towels underneath it, use wedges, or use a car seat for routine sleep.
When should I take a baby with bronchiolitis to emergency care?
Get emergency help for severe breathing trouble, pauses in breathing, blue or gray lips or skin, marked chest pulling, grunting, a baby who is floppy, or a baby who will not wake or stay awake.
How long does bronchiolitis last?
Symptoms often peak around days 3 to 5. Breathing usually improves after that, but the cough can last about 3 weeks.
Is bronchiolitis the same as RSV?
No. RSV is a virus. Bronchiolitis is inflammation of the small airways that can be caused by RSV or other viruses.
Can bronchiolitis be prevented?
Not every case can be prevented. Handwashing, keeping sick people away from young babies, avoiding smoke, and using current RSV prevention options when recommended can reduce risk.
