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Acute abdominal pain in children

Medical Professionals

Professional Reference articles are designed for health professionals to use. They are written by UK doctors and based on research evidence, UK and European Guidelines. You may find the Recurrent abdominal pain in children article more useful, or one of our other health articles.

See also the separate Recurrent Abdominal Pain in Children article.

Childhood abdominal pain is a very common reason for parents to seek medical advice. For most children the presenting abdominal pain is functional and is benign and self-limiting.1 However, this means that we need to be especially astute at picking up the more serious cases which can be life-threatening.2

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How common is acute abdominal pain? (Epidemiology)2

  • Acute abdominal pain is a common complaint in childhood and it can be caused by a wide range of underlying surgical and non-surgical conditions.

  • The most common non-surgical condition is gastroenteritis, while the most common surgical condition is appendicitis.

  • Appendicitis accounts for more than 40,000 hospital admissions in England every year. Appendicitis is the most common non-obstetric surgical emergency during pregnancy, with an incidence of 0.15-2.10 per 1,000 pregnancies.3

  • The frequency of surgical intervention in patients presenting with acute abdominal pain is around 1% but it is essential not to overlook a serious organic aetiology on clinical assessment.

Acute abdominal pain symptoms (presentation)


This varies according to the age of the patient.

  • Neonates and babies may present with crying and difficulty feeding.

  • Toddlers - can usually answer simple questions.

  • Teenagers - may be more embarrassed to talk about the pain.

  • Ask about duration, location, character.

  • Associated symptoms include vomiting, diarrhoea, fever, groin pain, urine symptoms, bloody diarrhoea, vaginal discharge.

  • Also enquire about recent travel history.

  • Gynaecological and sexual history may also be appropriate.

Physical examination

  • Note whether the child looks ill.

  • Babies may have abnormal facial expressions.

  • Haemodynamic status - pulse rate, blood pressure in older patients, mucous membranes, urine - eg, wet nappy.

  • Rash - eg, Henoch-Schönlein purpura.

  • Icteric.

  • Temperature.

  • Note whether the child can be distracted from the pain.

  • Ask the patient to suck the abdomen in and blow it out.

  • Get them to point at the pain with one finger.

  • Check the abdomen for tenderness, rebound tenderness, guarding, organomegaly, loin pain, bowel sounds.

  • In males, check the testes for torsion.

  • Rectal and vaginal examinations should only be performed if they will provide significant information.

  • Other system examination as appropriate.

  • Urine dipstick.

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Causes of abdominal pain in children

See also the separate Abdominal Pain article. The causes and presentation of abdominal pain may be similar to adults', especially for older children.

Causes of abdominal pain in children according to age

Age group

Medical causes

Surgical causes

Other causes

Birth-1 year



Urinary tract infection (UTI)



Incarcerated hernia

Infantile colic

Hirschsprung's disease

2-5 years








Mesenteric lymphadenitis

Henoch-Schönlein purpura

Diabetic ketoacidosis

Sickle cell crises

6-11 years






Mesenteric lymphadenitis

Abdominal migraine

Henoch-Schönlein purpura

Diabetic ketoacidosis

Sickle cell crises


Functional pain

12-18 years





Ovarian torsion

Testicular torsion


Diabetic ketoacidosis

Mittelschmerz (ovulation)

Threatened abortion

Ectopic pregnancy

Pelvic inflammatory disease

Inflammatory bowel disease

Adrenal crisis


  • These will depend upon the clinical findings and may not be needed - eg, viral gastroenteritis.

  • Urinalysis - microscopy, culture, sensitivities, stone analysis.

  • Blood tests - capillary blood glucose, plasma glucose, FBC, renal function, liver function, inflammatory markers, amylase.

  • Other blood tests if indicated - eg, paracetamol levels, TFTs.

  • Stool samples if there is diarrhoea - microscopy, culture and sensitivity; ova, cysts and parasites.

  • Abdominal imaging - abdominal X-ray (looking for obstruction), CXR (looking for pneumonia and air under the diaphragm), ultrasound scan of the abdomen and testes.4 5

  • CT scan may also be appropriate.

  • More specialist investigations - eg, barium enema - will depend upon preliminary findings.

The Paediatric Appendicitis Score (PAS) has been shown to be useful in children presenting with acute abdominal pain to assess whether further investigations and/or intervention is required.6 The PAS (range 0-10) assigns 1 point (unless otherwise stated) for each component present: migration of pain, anorexia, nausea/vomiting, right lower quadrant tenderness (2 points), cough/percussion/hopping tenderness (2 points), elevated temperature (fever >38°C), leukocytosis >10,000 cells/mm3, and polymorphonuclear neutrophilia >7,500 cells/mm3.

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Acute abdominal pain treatment and management

This depends on the cause. Self-limiting causes - eg, gastroenteritis - may just require reassurance and simple advice to parents and carers. The advice should include continued use of the child's usual and age-appropriate diet to prevent and limit dehydration. Clear liquids should not be substituted for oral rehydration solutions or regular diets to prevent or treat dehydration.

For other causes, more specific therapies may be required - eg, surgery in appendicitis, treatment of diabetic ketoacidosis with insulin, fluids and potassium.

Some specific causes

Infantile colic (gripe)7

  • Occurs in babies in the first few months after the birth month.

  • Babies scream, draw up their knees and experience severe pain.

  • Episodes can last up to three hours and occur often in a week.

  • Changes in feed type and routine may help.

  • Over-the-counter medicines - eg, simeticone -have not been proven to be of benefit.8

Mesenteric lymphadenitis9

  • This is associated with adenoviral infection.

  • It presents similarly to appendicitis but there is no peritonism.

  • The abdominal pain tends to be more diffuse.

  • There may also be generalised lymphadenopathy.

Pitfalls to watch out for in children with abdominal pain

  • The diagnosis and excluding serious underlying conditions may be particularly difficult with infants and young children.10 11

  • In females, always consider gynaecological disorders and pregnancy-related disorders (you may need to speak to the patient alone).

  • Male patients - always consider torsion of the testes.

  • Consider illicit drug use.

  • Consider whether there is a possibility of child abuse.

Additional management may include:

  • Referring the patient if you are unsure or concerned.

  • Repeating the physical examination - may help.

  • Using analgesia as required - it does not affect diagnostic accuracy.11

Further reading and references

  • Hijaz NM, Friesen CA; Managing acute abdominal pain in pediatric patients: current perspectives. Pediatric Health Med Ther. 2017 Jun 29;8:83-91. doi: 10.2147/PHMT.S120156. eCollection 2017.
  • Elgharbawy F, Salameh K, Al Rayes T, et al; Pediatric case of acute right-sided abdominal pain: diagnosis is not always appendicitis. Pediatric Health Med Ther. 2017 Jun 8;8:69-71. doi: 10.2147/PHMT.S133409. eCollection 2017.
  • Naffaa L, Barakat A, Baassiri A, et al; Imaging Acute Non-Traumatic Abdominal Pathologies in Pediatric Patients: A Pictorial Review. J Radiol Case Rep. 2019 Jul 31;13(7):29-43. doi: 10.3941/jrcr.v13i7.3443. eCollection 2019 Jul.
  1. Spee LA, Lisman-Van Leeuwen Y, Benninga MA, et al; Prevalence, characteristics, and management of childhood functional abdominal pain in general practice. Scand J Prim Health Care. 2013 Dec;31(4):197-202. doi: 10.3109/02813432.2013.844405. Epub 2013 Oct 10.
  2. Kim JS; Acute Abdominal Pain in Children. Pediatr Gastroenterol Hepatol Nutr. 2013 Dec;16(4):219-224. Epub 2013 Dec 31.
  3. Appendicitis; NICE CKS, May 2021 (UK access only)
  4. Debnath J, George RA, Ravikumar R; Imaging in acute appendicitis: What, when, and why? Med J Armed Forces India. 2017 Jan;73(1):74-79. doi: 10.1016/j.mjafi.2016.02.005. Epub 2016 Mar 29.
  5. Radonjic T, Popovic M, Zdravkovic M, et al; Point-of-Care Abdominal Ultrasonography (POCUS) on the Way to the Right and Rapid Diagnosis. Diagnostics (Basel). 2022 Aug 24;12(9). pii: diagnostics12092052. doi: 10.3390/diagnostics12092052.
  6. Salahuddin SM, Ayaz O, Jaffer M, et al; Pediatric Appendicitis Score for Identifying Acute Appendicitis in Children Presenting With Acute Abdominal Pain to the Emergency Department. Indian Pediatr. 2022 Oct 15;59(10):774-777. Epub 2022 Aug 10.
  7. Banks JB, Rouster AS, Chee J; Colic
  8. Ellwood J, Draper-Rodi J, Carnes D; Comparison of common interventions for the treatment of infantile colic: a systematic review of reviews and guidelines. BMJ Open. 2020 Feb 25;10(2):e035405. doi: 10.1136/bmjopen-2019-035405.
  9. Helbling R, Conficconi E, Wyttenbach M, et al; Acute Nonspecific Mesenteric Lymphadenitis: More Than "No Need for Surgery". Biomed Res Int. 2017;2017:9784565. doi: 10.1155/2017/9784565. Epub 2017 Feb 2.
  10. Marzuillo P, Germani C, Krauss BS, et al; Appendicitis in children less than five years old: A challenge for the general practitioner. World J Clin Pediatr. 2015 May 8;4(2):19-24. doi: 10.5409/wjcp.v4.i2.19. eCollection 2015 May 8.
  11. Snyder MJ, Guthrie M, Cagle S; Acute Appendicitis: Efficient Diagnosis and Management. Am Fam Physician. 2018 Jul 1;98(1):25-33.

Article History

The information on this page is written and peer reviewed by qualified clinicians.

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