Will my child grow out of enlarged adenoids?

Often yes — adenoids naturally shrink through later childhood and the teens, and many children improve as they grow or once allergies are treated.

What symptoms should prompt a doctor’s visit?

Persistent mouth breathing and blocked nose, loud snoring especially with pauses or gasping in sleep, and any hearing concerns warrant an ENT review.

Can enlarged adenoids affect hearing?

Yes — they can block the Eustachian tubes, leading to recurrent ear infections and glue ear (fluid behind the eardrum), which can reduce hearing.

Is removing the adenoids safe for the immune system?

The adenoid’s immune role is greatest in the first few years of life, with no evidence it is important afterwards, and removal is one of the most common childhood ENT operations; other lymphoid tissue continues to provide immune defence.

Enlarged Adenoids in Children: Snoring, Ears & Surgery (Singapore)

Q: When is surgery needed?

Adenoidectomy is considered for significant obstruction, obstructive sleep apnoea, or recurrent ear disease, and is frequently combined with tonsil removal and/or grommets.

Written & reviewed by the BestDoctors.sg editorial team · Last updated 1 Sep 2026 · General information, not medical advice

Quick answer. Adenoids are a patch of immune (lymphoid) tissue high at the back of the nose. They are prominent in young children and usually shrink by the teens. They can enlarge from repeated infections or allergies, and when big they block the back of the nose and the Eustachian tubes. This causes a persistently blocked nose, mouth breathing, snoring and disturbed sleep (including obstructive sleep apnoea), and recurrent ear problems such as glue ear with hearing loss. Many children improve as they grow or with treatment of allergies; significant obstruction, sleep apnoea or recurrent ear disease may need surgery (adenoidectomy), often with tonsil removal and/or ear grommets.

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Enlarged adenoids are one of the commonest reasons a child snores, mouth-breathes or keeps getting ear trouble – and the good news is that many children grow out of it, while surgery helps those who do not.

What adenoids are

The adenoid is a small pad of lymphoid tissue tucked high at the back of the nose, where the nasal passages meet the throat – a spot you cannot see by simply looking in the mouth. It forms part of a ring of immune tissue (Waldeyer’s ring) that also includes the tonsils, and its job is to sample germs breathed in through the nose and help the body learn to fight them. This immune role matters most in the first few years of life. The adenoid is naturally largest in early childhood, then shrinks steadily through later childhood and the teenage years, so by adulthood there is usually very little left. Because it is designed to react to infection, it is quite normal for the adenoid to swell during a cold and settle again afterwards – problems arise only when it stays large enough to cause persistent blockage.

Why enlarged adenoids cause problems

Because adenoids sit in the airway and constantly trap germs, the tissue can swell with repeated infections, and allergies (such as house-dust-mite or other nasal allergy) can keep it enlarged too. In many children the adenoid is simply naturally big for their age. When persistently large, it does two things. First, it physically blocks the back of the nose, so air has to come through the mouth instead. Second, it can obstruct the openings of the Eustachian tubes – the narrow channels that ventilate the middle ears and keep the eardrums working normally. Blocking these tubes is why enlarged adenoids so often go hand in hand with ear trouble.

Symptoms

The typical picture is a child with a persistently blocked nose and habitual mouth breathing, often with the mouth held open in the day and especially at night. Common features include:

Snoring and noisy, restless sleep, sometimes with the child sleeping in odd positions or with the neck extended to open the airway.
A nasal-sounding voice (as if the child is talking with a blocked nose) and a runny or congested nose that never quite clears.
Recurrent ear infections or glue ear because of the blocked Eustachian tubes, which can dull a child’s hearing – you may notice they turn the television up, mishear or seem inattentive.
In some children, obstructive sleep apnoea – loud snoring interrupted by pauses in breathing, gasping or choking sounds, and very disturbed sleep.

Adenoids often enlarge together with the tonsils, so a child may have snoring and mouth breathing from both.

Causes of enlargement and who is at risk

A larger adenoid is often just part of normal childhood, when the tissue is at its natural peak. On top of that, frequent upper-respiratory infections and allergies can keep the tissue swollen. It is mainly a condition of young children – roughly the pre-school and early primary-school years – because the adenoid is largest then and children get more infections while their immune systems are still learning. As the tissue shrinks with age, the problem usually eases, which is why enlarged adenoids are far less common in teenagers and adults.

How it is diagnosed

A GP, paediatrician or ENT specialist starts with the story and an examination. Because the adenoid cannot be seen through the mouth, the specialist may pass a thin, flexible nasal camera (nasoendoscope) through the nose to look directly at it, or occasionally arrange a simple X-ray of the area to gauge its size. Where hearing is a concern, a hearing test and a check of the middle ear help detect glue ear. If sleep-disordered breathing is suspected, the doctor may recommend a sleep assessment (sleep study) to confirm and grade obstructive sleep apnoea. In Singapore this typically means a referral from a GP or polyclinic to a paediatrician or ENT specialist, who decides which tests are needed.

Complications

The main reason enlarged adenoids matter is disturbed sleep. When the airway is partly blocked, a child cannot reach deep, restorative sleep, and in more severe cases this becomes obstructive sleep apnoea – repeated pauses in breathing during sleep. Poor sleep in children is linked to daytime tiredness, irritability, poor concentration, behaviour difficulties and effects on learning and school performance. Blocked Eustachian tubes can lead to recurrent ear infections, glue ear and temporary hearing loss, which in young children can also affect speech and language development, as well as ongoing sinus and nasal problems. Occasionally, long-term mouth breathing is associated with changes in facial growth and dental alignment. Most of these effects improve once the obstruction is treated.

Red flag – possible obstructive sleep apnoea. If a child has loud snoring with pauses in breathing, gasping or choking in sleep, very restless sleep, and daytime tiredness or behaviour problems, this should be assessed by a doctor. Obstructive sleep apnoea in children is treatable, and getting it looked at protects sleep, growth and learning.

Treatment

Treatment depends on how much trouble the adenoids are causing. Many children need no surgery at all: because the tissue naturally shrinks with age, symptoms often settle over time. Where allergy or infection is driving the swelling, treating the underlying cause – for example managing nasal allergy or infections as advised by the doctor – can help the nose clear.

When there is significant blockage, obstructive sleep apnoea or recurrent ear disease, surgery to remove the adenoid – an adenoidectomy – may be recommended. This is done through the mouth under general anaesthetic, with no external cut. It is often combined with tonsillectomy (removing the tonsils) when both are enlarged and causing sleep problems, and/or with insertion of ear grommets (ventilation tubes) when there is persistent glue ear affecting hearing. An ENT specialist will explain which combination fits the individual child, along with the benefits and the usual risks of surgery.

Living with it and what to expect

For most children the outlook is very good. Where surgery is not needed, parents can expect gradual improvement as the child grows, with the doctor keeping an eye on sleep and hearing in the meantime. Where an adenoidectomy is done, children usually recover within a couple of weeks, and parents often notice quieter sleep, easier nasal breathing and fewer ear problems afterwards. Simple measures – treating nasal allergy, managing colds sensibly, and following up on any hearing concerns – help keep things on track. If snoring, mouth breathing or ear symptoms return or worsen, it is worth going back to the doctor for review.

When to see a doctor

See a GP, polyclinic doctor, paediatrician or ENT specialist if your child has persistent nasal blockage or mouth breathing, loud or ongoing snoring, recurrent ear infections, or hearing concerns. Seek assessment sooner if you notice signs of obstructive sleep apnoea – snoring with pauses in breathing, gasping, very restless sleep and daytime tiredness or behaviour changes. Reliable general information for parents is also available on Singapore’s HealthHub. These are not emergencies, but they are worth checking, because treating enlarged adenoids protects a child’s sleep, hearing and development.

Related ear, nose & throat conditions

Sources

SingHealth / HealthXchange — tonsils and adenoids in children: what adenoids are, function, indications for surgery (Singapore source).
SingHealth — tonsils and adenoids: symptoms and treatments overview.
NUH (Singapore) — snoring and sleep apnoea in children: enlarged adenoids/tonsils as the commonest cause; consequences; diagnosis and treatment.
KidsHealth (Nemours) / Nationwide Children’s — enlarged adenoids: symptoms, allergy/infection causes, adenoidectomy.

General information only. This guide is general information about an ear, nose or throat condition and is not a diagnosis or personalised medical advice. See a doctor — a GP or an ENT specialist — for assessment, tests and treatment. Sudden hearing loss in one ear should be seen urgently, and call 995 for sudden severe vertigo with a bad headache, slurred speech, double vision or one-sided weakness.

Enlarged Adenoids in Children (Singapore)