Nasal flaring

Alternative names

Flaring of the alae nasi (nostrils); Nostrils - flaring

Definition

Nasal flaring refers to enlargement of the opening of the nostrils during breathing.

Considerations

Nasal flaring is seen mostly in infants and younger children. Nasal flaring is often an indication that increased effort is required for breathing.

Any condition that causes the infant to work harder to obtain enough air can cause nasal flaring. While many causes of nasal flaring are not serious, some can be life-threatening.

In young infants, nasal flaring can be a very important sign of respiratory distress.

Common Causes

• Airway obstruction (any cause)
  
• Bronchiolitis
  
• Croup
  
• Asthma (acute)
  
• Acute epiglottitis
  
• Transient tachypnea of the newborn
  
• Pneumonia
  

Home Care

For any sign of difficulty breathing, emergency help should be sought immediately.

Call your health care provider if

• There is any persistent, unexplained nasal flaring, especially in a young child.
  
• Bluish color develops in the lips, nail beds, or skin. This indicates that breathing difficulty is severe and may indicate that an emergency condition is developing.
  
• You have any suspicion that your child is having trouble breathing.
  

What to expect at your health care provider's office

A history and physical assessment of the child will be done to determine if the flaring is due to upper or lower respiratory problems. Administration of oxygen (if needed) and ordering of any lab work or X-ray studies that might assist in the diagnosis may also be performed.

Medical history questions may include:

• When did it start?
  
• Is the person getting better or worse?
  
• Does the person look blue?
  
• Is the breathing noisy or are there wheezing sounds?
  
• Are there grunting noises with the breathing?
  
• Does the person look like they are working hard to breathe?