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Bronchiolitis (In Children): Its Symptoms, Types, Causes and Treatment

By Medical Expert Team

Oct 01 , 2024 | 4 min read

Bronchiolitis is a common lung infection affecting young children, primarily under the age of 2. This respiratory condition involves inflammation in the small airways, known as bronchioles, which fill with mucus, making it difficult to breathe. Bronchiolitis is typically caused by viral infections but may also be triggered by allergies or asthma. Early detection and treatment can help manage symptoms effectively.


Key Symptoms of Bronchiolitis at a Glance

  • Runny nose and nasal congestion
  • Cough and labored breathing
  • Mild fever
  • Loss of appetite and fatigue


Difference Between Bronchitis and Bronchiolitis

While bronchitis and bronchiolitis sound similar, they affect different parts of the respiratory system and present distinct symptoms.

Feature Bronchitis Bronchiolitis
Age Group Mostly affects adults and older children Primarily infants and young children
Affected Area Large airways (bronchi) Small airways (bronchioles)
Symptoms Persistent cough, chest discomfort, mucus Wheezing, rapid breathing, congestion
Cause Viral or bacterial infection, irritants Viral infections, primarily RSV


Bronchiolitis Symptoms

Understanding the symptoms of bronchiolitis helps in early identification and management. Here’s a breakdown of common and severe symptoms:

Common Symptoms

  • Runny Nose: Often the first sign of bronchiolitis, which may progress from clear to thicker mucus.
  • Loss of Appetite: Infants may refuse to feed due to discomfort.
  • Shallow Breathing: Difficulty in taking deep breaths.
  • Cough: Persistent cough, which may be dry or productive.
  • Stuffy Nose: Nasal congestion further complicates breathing.

Severe Symptoms

  • Wheezing: High-pitched sounds while breathing, indicating airway obstruction.
  • Persistent Coughing: Prolonged cough may signal a worsening condition.
  • Vomiting: May result from cough reflex or breathing difficulties.
  • Grunting and Trouble Drinking: Infants may struggle to drink fluids or breastfeed.
  • Blue or Gray Skin: Cyanosis due to low oxygen levels requires immediate attention.

When to Seek Help

Contact a healthcare provider if your child:

  • Experiences blue or gray skin color
  • Has trouble drinking or shows signs of dehydration
  • Breathes with difficulty or wheezes persistently


Bronchiolitis Types

Bronchiolitis can be categorized based on its cause, with different types requiring specific management.

  • Viral Bronchiolitis: The most common type, caused by viruses like respiratory syncytial virus (RSV), rhinovirus, and influenza. Often seasonal, this type spreads through respiratory droplets.
  • Allergic Bronchiolitis: Triggered by allergens like dust or pet dander, leading to inflammation and respiratory symptoms.
  • Asthmatic Bronchiolitis: Seen in children with asthma, this type involves airway narrowing due to inflammation.


Bronchiolitis Causes

Bronchiolitis is most often caused by respiratory viruses, with RSV being the leading cause. Here’s a look at the most common culprits:

  • Respiratory Syncytial Virus (RSV): Highly contagious and commonly infects children by age 2.
  • Adenoviruses: These viruses cause respiratory infections year-round, leading to bronchiolitis or pneumonia.
  • Influenza Viruses: While primarily causing flu, they can also lead to bronchiolitis in young children.

How it Spreads

Bronchiolitis is highly contagious, spreading through:

  • Respiratory droplets from sneezes or coughs
  • Contact with contaminated surfaces like toys or door handles


Bronchiolitis Risks and Complications

While bronchiolitis often resolves with care, certain factors increase the risk of complications.

High-Risk Groups

  • Premature Infants: Underdeveloped lungs make breathing more difficult.
  • Heart or Lung Conditions: Children with congenital heart disease or asthma are more susceptible.
  • Weakened Immune Systems: Those undergoing treatments or with chronic conditions.

Potential Complications

  • Inadequate Oxygen Intake: Severe cases can lead to low oxygen, causing cyanosis.
  • Difficulty Drinking: Respiratory distress can hinder feeding, risking dehydration.
  • Low Oxygen Levels (Hypoxia): This serious condition may require hospitalization.


Bronchiolitis Prevention

Prevention is key to reducing the risk of bronchiolitis, especially during peak seasons.

Preventive Measures

  • Limit Contact: Avoid crowded places, particularly with infants, during cold and flu season.
  • Frequent Handwashing: Wash hands thoroughly, especially after being in public.
  • Disinfect Surfaces: Regularly clean commonly touched items and toys.
  • Avoid Sharing Cups or Utensils: Prevents cross-contamination within families.

Vaccines and Medications

  • RSV Vaccine: Recommended for high-risk infants, this vaccine can reduce the severity of bronchiolitis.
  • Influenza Vaccine: Can help prevent flu-related respiratory issues, reducing bronchiolitis risk.


Bronchiolitis Treatment

While there’s no cure, treatment focuses on symptom relief and supportive care.

At-Home Care

  • Ensure Hydration: Encourage small, frequent feeds or oral rehydration solutions.
  • Use Saline Drops: Eases nasal congestion, especially before feeding.
  • Humidifier: Helps keep airways moist, easing breathing.

Medications

When Hospitalization is Needed

Severe cases may require hospitalization, where oxygen therapy and intravenous (IV) fluids provide additional support. In rare cases, children may need respiratory support.


Home Remedies to Treat Bronchiolitis

  • Hydration: Keep fluids like water, clear soup, or milk (for breastfed infants) accessible.
  • Fever Management: Use age-appropriate fever reducers after consulting a healthcare provider.
  • Minimize Exposure to Irritants: Keep the child away from smoke, strong perfumes, and other airborne irritants.


Frequently Asked Questions

1. What Age is Bronchiolitis Common? 

Bronchiolitis typically affects infants and young children under the age of 2.

2. Can Bronchiolitis Cause Permanent Lung Damage? 

With proper treatment, most children recover fully without long-term effects.

3. How is Bronchiolitis Different from Pneumonia? 

Bronchiolitis affects small airways, while pneumonia impacts the air sacs, often with bacterial causes.

4. How Long Does Bronchiolitis Last? 

Symptoms improve within a week, though some may linger for several weeks.

5. Can a Child Have Bronchiolitis More Than Once? 

Yes, especially since various viruses cause it.

6. When Should I Take My Child to the Hospital? 

Seek immediate help if your child has blue lips or difficulty breathing.

7. Is Bronchiolitis a Risk Of Pneumonia?

While bronchiolitis and pneumonia are both respiratory infections, they are caused by different viruses. However, having bronchiolitis can increase the risk of developing secondary bacterial pneumonia.

8. Are Antibiotics Used for Bronchiolitis?

Bronchiolitis is usually caused by a viral infection and antibiotics are not effective against viruses. Antibiotics may only be prescribed if there is a secondary bacterial infection present.

9. How Long Does It Take To Recover From Bronchiolitis?

Most children with mild-to-moderate cases of bronchiolitis recover within 1-2 weeks with appropriate care at home. However, in severe cases or for children with underlying health conditions, recovery may take longer.


Written and Verified by:

Medical Expert Team