Children’s ENT

Children’s Snoring and Mouth Breathing

Adenoids, tonsils, sleep and what parents should notice.

A parent-friendly guide to children’s snoring, mouth breathing, adenoids, tonsils, sleep quality and signs that need medical advice.

Children’s ENT7 min readGeneral informationUpdated May 2026

Regular snoring is not automatically dangerous, but it is worth noticing the pattern and daytime effects.

Occasional snoring is common

Snoring during a cold may settle. Regular loud snoring needs more attention.

Adenoids and tonsils matter

Enlarged adenoids or tonsils are common reasons children breathe noisily during sleep.

Daytime signs count

Tiredness, hyperactivity, poor concentration, morning headaches or behavioural change can be part of the picture.

What parents may notice

Many children snore now and again, especially during a cold. The question is whether the pattern is occasional and short-lived, or regular and affecting sleep quality. Regular loud snoring, mouth breathing, restless sleep or pauses in breathing are worth discussing with a healthcare professional.

At night, parents may notice snoring, heavy breathing, gasping, restless sleep, sweating, unusual sleeping positions, bedwetting, or brief pauses followed by a snort or gasp. During the day, some children are sleepy, but others become more hyperactive, irritable or difficult to settle. Concentration, school performance and behaviour may be affected by poor-quality sleep.

A short video can helpA brief phone video of typical snoring, pauses, gasping or restless breathing can be useful during a consultation. Record safely without disturbing the child.

How adenoids and tonsils fit in

Adenoids sit high at the back of the nose. Tonsils sit at the back of the throat. Both are part of the immune system, and both can become enlarged in children. Enlarged adenoids can make it harder to breathe through the nose, leading to noisy breathing, mouth breathing, a blocked-nose sound, nasal speech, snoring and disturbed sleep.

When tonsils and adenoids narrow the airway during sleep, some children develop obstructive sleep apnoea, where breathing partly or completely blocks for short periods. Not every snoring child has sleep apnoea, but loud regular snoring with pauses, gasping or daytime effects deserves attention.

Allergy, recurrent infections, nasal blockage, weight, craniofacial differences and neuromuscular conditions can also contribute. That is why assessment looks at the whole child rather than the snoring sound alone.

Watercolour infographic showing a child breathing, sleeping and daytime tiredness patterns — Night-time breathing and daytime behaviour belong together when thinking about children’s snoring.

What assessment may involve

A clinician may ask how often snoring happens, whether there are pauses, how the child sleeps, whether they breathe through the mouth in the day, whether speech sounds nasal, and whether there are hearing, ear, allergy or infection symptoms. Growth, daytime energy, behaviour and school concerns may also be relevant.

Examination may include looking in the mouth, checking tonsil size, assessing nasal airflow and looking for signs of allergy or nasal blockage. Sometimes further tests are needed, such as hearing tests, allergy management, nasal endoscopy, overnight oxygen monitoring or a sleep study, depending on the severity and local pathways.

Treatment depends on the cause and severity. Mild symptoms may be watched or managed medically if allergy or nasal inflammation is part of the problem. More significant obstructive sleep apnoea related to enlarged tonsils and adenoids may lead to discussion about surgery, usually after weighing benefits, risks and the child’s overall health.

When to seek help

Discuss symptoms if your child snores loudly most nights, has witnessed pauses in breathing, gasps or chokes during sleep, breathes mainly through the mouth, has restless sleep, struggles with daytime tiredness or hyperactivity, or has concerns with growth, behaviour, concentration or school.

Urgent breathing concernsUse urgent care if a child is struggling to breathe, has blue lips, is unusually drowsy or difficult to wake, has severe dehydration, or you are worried their breathing is unsafe.

Sources and further reading

This article is general public information and was written using UK, European and well-regarded US sources. It should not replace personal medical advice.

Obstructive sleep apnoeaGreat Ormond Street Hospital
Inflamed adenoidsGreat Ormond Street Hospital
Sleep apnoeaNHS
Paediatric snoring and obstructive sleep apnoea guidelineENT UK
Pediatric obstructive sleep apneaMayo Clinic