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Health condition · Clinically reviewed

Paediatric hernias, groin and umbilical bulges in children explained.

Inguinal hernias need surgery. Most umbilical hernias sort themselves out. Knowing which is which - and spotting the emergency signs - matters most.

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Why trust this guide

  • 01

    Clinically reviewed

    Written by our editorial team and reviewed by a registered UK clinician before publication.

  • 02

    Sourced from guidance

    Checked against NICE, RCPCH and paediatric surgical society sources you can see at the end.

  • 03

    Current for 2026

    Reflects modern UK guidance on inguinal and umbilical hernia repair timing in children.

Key facts

Paediatric hernias at a glance.

The essentials, in plain English - what the two main types are, and how each is managed in the UK today.

  • Inguinal hernia

    The most common type in children - from a patent processus vaginalis, more frequent in boys and premature infants.

  • Umbilical hernia

    Very common in infants - most close on their own by age 2 to 4 without any treatment.

  • Other types

    Epigastric hernias and, less often, other midline defects can present in a similar way.

  • Incarceration risk

    Inguinal hernias carry a small but real risk of trapped bowel or tissue - the main reason for prompt repair.

  • Reducibility

    A reducible bulge can be gently pushed back. A firm, tender, non-reducible lump is an emergency sign.

  • Main treatment

    Surgical herniotomy for inguinal hernias; watchful waiting for most umbilical hernias in early childhood.

Why this guide matters

Two hernias, two very different plans.

Parents often assume all childhood hernias behave the same way. They do not - and mixing up the two common types leads to unnecessary worry or, worse, delay.

  • Inguinal hernias always need surgery

    They do not resolve spontaneously and carry a real incarceration risk - repair is recommended for essentially every child, even without symptoms.

  • Umbilical hernias usually resolve alone

    Most close by age 2 to 4 with no treatment at all - watchful waiting is the right approach for the large majority of infants.

  • Incarceration is the emergency to know

    A firm, tender, non-reducible lump - especially with distress or vomiting - needs immediate assessment, not a wait-and-see approach.

How the diagnosis is made

From a noticed bulge to a clear plan.

The steps a UK GP or paediatric surgical team will normally follow, in order - so you know what to expect and why.

  1. 01

    Assessing

    Parent-reported bulge

    A swelling at the groin or umbilicus, often first noticed by a parent - more prominent with crying, coughing or straining.

  2. 02

    Assessing

    Clinical examination

    Often the main diagnostic tool - the clinician looks for the bulge with the child upright, straining, or crying, and checks both groins.

  3. 03

    Assessing

    Assessing reducibility

    Gentle attempts to reduce the swelling and checks for tenderness, skin colour change or firmness that suggest incarceration.

  4. 04

    Confirming

    Ultrasound if uncertain

    Reserved for diagnostic uncertainty - for example an intermittent bulge not seen in clinic, or to distinguish from a hydrocele.

  5. 05

    Confirming

    Distinguishing hernia types

    Groin swellings are treated as inguinal hernias until proven otherwise; umbilical and epigastric swellings are assessed separately.

  6. 06

    Preparing

    Paediatric surgical referral

    Any inguinal hernia is referred to paediatric surgery given the incarceration risk - urgency depends on the child’s age.

  7. 07

    Preparing

    Planning repair timing

    Infants are prioritised for earlier surgery because incarceration risk is highest in the first months of life.

Typical timeline: a first assessment to a settled plan within one or two clinic visits.

Symptoms

What a childhood hernia actually looks like.

The classic bulge at the groin or umbilicus, made worse by crying or straining. And the features that mean it’s time to escalate.

  • Groin bulge

    A visible or palpable swelling in the groin or, in boys, extending into the scrotum - the hallmark of an inguinal hernia.

  • Umbilical bulge

    A soft swelling at the umbilicus, often present from early infancy and more noticeable when the baby cries.

  • Worse with straining

    Both inguinal and umbilical hernias become more prominent with crying, coughing, or straining, and often settle when the child is calm.

  • Reducible swelling

    In an uncomplicated hernia, the bulge can usually be gently pushed back or disappears when the child relaxes or lies flat.

  • Epigastric hernia

    A small midline bulge above the umbilicus, usually painless and often noticed incidentally.

  • Intermittent appearance

    Some hernias are only seen occasionally, which is why a parent’s description matters even if nothing is visible in clinic.

  • Firm, tender, non-reducible lump

    A lump that cannot be pushed back, is firm and tender, is a sign of possible incarceration, not a simple hernia.

  • Red flag - distress and vomiting

    A tender, non-reducible groin lump with distress or vomiting is a surgical emergency requiring immediate assessment.

Treatment

How paediatric hernias are treated in the UK.

Surgery for essentially all inguinal hernias, timed by age - and watchful waiting for most umbilical hernias, with repair reserved for those that persist.

  • Herniotomy (inguinal)

    The standard operation for inguinal hernia in children - closes the patent processus vaginalis. Recommended for essentially all children with an inguinal hernia.

  • Urgent repair in infants

    Because incarceration risk is highest in the first year of life, infants are typically offered surgery on a more urgent timescale than older children.

  • Elective repair in older children

    Beyond infancy, repair is still recommended for all inguinal hernias but can usually be scheduled electively rather than urgently.

  • Watchful waiting (umbilical)

    Appropriate for most umbilical hernias in infants and toddlers - the majority close spontaneously by age 2 to 4 without any intervention.

  • Elective umbilical repair

    Considered if the hernia persists beyond age 4 to 5, is very large, or becomes symptomatic - a straightforward day-case procedure.

  • Emergency reduction

    For an incarcerated hernia, gentle manual reduction is attempted first; if unsuccessful, immediate surgical reduction and repair follow.

  • Post-operative care

    Most children go home the same day after herniotomy, with simple analgesia and a brief period of reduced activity.

  • Follow-up review

    A wound check and confirmation of full recovery, plus advice on the small chance of recurrence or a hernia developing on the other side.

What this guide is based on

The sources behind every claim on this page.

UK national guidance and paediatric surgical society standards, current at the time of last review.

Key references

Guidelines and standards we relied on.

A quiet reminder

This guide is for information, not medical advice.

Your GP or paediatric surgeon knows your child’s history and can tell you which parts apply to them. If in doubt, get seen.

  • NICE Clinical Knowledge Summaries. Hernias - inguinal.

  • Royal College of Paediatrics and Child Health (RCPCH). Guidance on common childhood surgical conditions.

  • British Association of Paediatric Surgeons (BAPS). Patient information on inguinal and umbilical hernia repair.

  • European Paediatric Surgeons’ Association. Consensus statements on paediatric hernia management.

Red flags

When a hernia needs urgent attention.

Most paediatric hernias are straightforward. These are the situations that aren’t - and where same-day medical review is needed.

  • Incarcerated inguinal hernia

    A firm, tender, non-reducible groin lump - a surgical emergency needing immediate assessment, especially in infants.

  • Distress and inconsolable crying

    A baby who is unusually distressed alongside a groin lump should be seen urgently, not watched at home.

  • Vomiting with a groin lump

    Vomiting alongside a non-reducible swelling can signal bowel obstruction from strangulation.

  • Skin colour change over the lump

    Redness, discolouration or shininess of the skin over a hernia suggests compromised blood supply and needs emergency review.

  • A lump that will not reduce

    Gentle pressure that fails to reduce a previously reducible hernia is a warning sign, not something to keep trying at home.

  • Fever with a firm groin swelling

    Fever alongside a tender, firm lump raises concern for strangulated bowel and needs same-day assessment.

  • Prematurity

    Premature infants have a higher incarceration risk and are usually prioritised for earlier surgical review.

  • Rapidly enlarging umbilical hernia

    Sudden growth or new tenderness in a previously stable umbilical hernia warrants reassessment.

  • Persisting hernia beyond age 4 to 5

    An umbilical hernia that has not closed by school age should be discussed with a paediatric surgeon about elective repair.

Living with it

A manageable condition, with a clear path forward.

Four things that make the biggest difference while you watch, wait, or wait for a surgery date - knowing the normal bulge, spotting the emergency signs, and having patience where it’s due.

A quiet reminder

Most childhood hernias resolve well, one way or another.

Whether that’s spontaneous closure or a straightforward day-case operation, the outlook for both inguinal and umbilical hernias in children is excellent.

  1. 01 Watch

    Know what a normal bulge looks like

    Get comfortable checking the bulge when your child is calm and when they cry, so you notice any change quickly.

  2. 02 Act fast

    Treat a firm, non-reducible lump as urgent

    If the swelling becomes hard, tender, and will not push back, seek same-day medical attention rather than waiting.

  3. 03 Patience

    Give umbilical hernias time

    Most close by age 2 to 4 without any treatment - taping, binding or “belly bands” do not speed this up and are not recommended.

  4. 04 Plan

    Ask about timing if surgery is advised

    For inguinal hernias, ask how urgently repair is needed for your child’s age, so you know what to expect while waiting.

Frequently asked

Everything we get asked about paediatric hernias.

Quick answers on inguinal repair, umbilical hernias, and when to worry.

  • What is a paediatric hernia?

    A bulge that occurs when tissue, such as bowel or fatty tissue, pushes through a weakness in the abdominal wall. In children, the two most common types are inguinal (groin) hernias and umbilical hernias.

  • Why are inguinal hernias more common in boys?

    Inguinal hernias develop from a patent processus vaginalis, a channel that normally closes after the testes descend into the scrotum before birth. Because this process is specific to boys’ anatomy, inguinal hernias are far more common in boys, and also more common in premature infants of either sex.

  • Does an umbilical hernia need surgery?

    Usually not. Most umbilical hernias in infants close on their own by age 2 to 4. Surgery is only considered if the hernia persists beyond age 4 to 5, is very large, or causes symptoms.

  • Why do inguinal hernias always need an operation, even without symptoms?

    Unlike umbilical hernias, inguinal hernias do not resolve on their own and carry a small but real risk of incarceration - where bowel or tissue becomes trapped and its blood supply compromised. Because of this risk, surgical repair is recommended for essentially all children with an inguinal hernia, even if it is not currently causing problems.

  • What does an incarcerated hernia look like?

    A firm, tender lump that cannot be gently pushed back, often with distress, crying, or vomiting in a baby or young child. This is a surgical emergency and needs immediate medical assessment, not observation at home.

  • How urgent is surgery for an inguinal hernia in a baby?

    More urgent than in older children, because the risk of incarceration is highest in infancy. Paediatric surgical teams typically prioritise infants for earlier repair, while older children can often be scheduled electively.

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