Does My Baby Have Enlarged Adenoids?
The short answer
Adenoids are immune tissue located behind the nose that can become enlarged, especially from frequent infections. Signs include persistent mouth breathing, loud snoring, nasal voice quality, chronic nasal congestion, and restless sleep. Enlarged adenoids can contribute to recurrent ear infections and sleep apnea. Adenoids typically grow during early childhood and begin to shrink by age 5-7. If they cause significant problems, surgical removal (adenoidectomy) may be recommended.
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By Age
What to expect by age
Adenoid enlargement is uncommon in very young babies. If your newborn has persistent nasal obstruction, other causes (such as choanal atresia or other structural issues) should be evaluated. Normal newborn nasal congestion is common and does not usually indicate adenoid problems.
Adenoids begin to grow as the immune system develops. Significant enlargement at this age is unusual. If your baby has persistent nasal breathing difficulty, chronic mouth breathing, or significant snoring, discuss with your pediatrician. These symptoms at this age are more commonly from other causes.
Adenoid growth increases as babies are exposed to more infections. If your baby snores frequently, breathes through the mouth habitually, or has chronic nasal congestion that does not improve with cold treatments, enlarged adenoids may be contributing. Your pediatrician may refer to an ENT for evaluation.
This is a common age for adenoid-related issues to become apparent. Signs include chronic mouth breathing, loud snoring, pauses in breathing during sleep (sleep apnea), recurrent ear infections, and nasal voice quality. Enlarged adenoids can block the eustachian tubes, contributing to ear fluid and infections.
Adenoids are typically at their largest between ages 2-6. If your child has significant sleep disruption from snoring and mouth breathing, recurrent ear infections, or has had ear tubes that are not resolving ear problems, an adenoidectomy may be recommended. The surgery is very common and recovery takes about 1-2 weeks.
What Should You Do?
When to take action
- Your baby snores mildly during a cold but breathes normally when well
- Occasional mouth breathing when congested that resolves when the illness clears
- Your baby's adenoids are mildly enlarged on examination but not causing symptoms
- Your baby is a habitual mouth breather, even when not sick
- Your baby snores loudly most nights
- Your baby has recurrent ear infections along with chronic congestion
- Your baby has pauses in breathing during sleep (observed apnea), gasping or choking during sleep, or seems to struggle to breathe through their nose constantly
- Your baby has such severe nasal obstruction that feeding is significantly impaired or they are failing to gain weight
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Trust your instincts. If something feels wrong, reach out to your pediatrician.
Worrying about your baby means you care. That is a good thing.
Related Medical Concerns
Could My Baby Have Tonsillitis?
Tonsillitis (inflammation of the tonsils) is usually caused by viral infections in babies and toddlers. It causes sore throat, difficulty swallowing, fever, and visibly red or swollen tonsils sometimes with white patches. Viral tonsillitis resolves on its own in 5-7 days. Bacterial tonsillitis (strep) is uncommon before age 2-3 but needs antibiotic treatment. See your pediatrician if your baby has a severe sore throat with high fever.
My Baby Breathes Through Their Mouth
Young babies are preferential nose breathers and typically only breathe through their mouths when crying. If your baby is consistently mouth breathing, it is usually due to nasal congestion from a cold or allergies. However, chronic mouth breathing in an infant or toddler, especially during sleep, can sometimes indicate enlarged adenoids, nasal obstruction, or other issues that warrant evaluation.
Baby Sleep Apnea Signs
Brief pauses in breathing (up to about 10 seconds) can be normal in young infants, especially premature babies, as their brainstem matures. However, pauses longer than 20 seconds, breathing accompanied by color changes or gasping, or habitual loud snoring with observed pauses should be evaluated by your pediatrician promptly.
When Should My Baby See a Pediatric ENT?
A pediatric ENT (otolaryngologist) specializes in ear, nose, and throat conditions in children. Common reasons for referral include recurrent ear infections (3+ in 6 months or 4+ in a year), hearing loss, chronic ear fluid, enlarged tonsils or adenoids causing sleep or breathing problems, stridor, chronic sinusitis, airway abnormalities, and neck masses. These specialists can perform ear tube surgery, tonsillectomy, adenoidectomy, and airway evaluations.
My Baby's Head Shape Looks Abnormal
Many babies develop temporary head shape irregularities that are completely normal. A cone-shaped head from vaginal delivery reshapes within days. Mild positional flattening (plagiocephaly) from sleeping on the back is very common and usually improves with repositioning and tummy time. However, head shape changes involving ridges, a persistently bulging fontanelle, or rapid head growth changes should be evaluated to rule out craniosynostosis.
Achondroplasia (Dwarfism) in Babies
Achondroplasia is the most common form of short-limbed dwarfism, affecting about 1 in 15,000 to 40,000 births. It is caused by a mutation in the FGFR3 gene and is usually apparent at birth with characteristic features including short limbs, a larger head, and a prominent forehead. Intelligence is normal. With monitoring for specific complications and supportive care, children with achondroplasia lead full, active, and independent lives.