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8
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Functional GI

37
Bristol Stool ScaleStool form types 1–7 and colonic transitRome IV Criteria for IBSIrritable bowel syndrome diagnosis and subtypeFunctional ConstipationRome IV — two of six items, IBS excludedOpioid-Induced ConstipationRome IV — constipation tied to opioid therapyFunctional DiarrhoeaRome IV — loose stools without predominant painFunctional Bloating / DistensionRome IV — bloating without other bowel disorder criteriaUnspecified Functional Bowel DisorderRome IV — bowel symptoms fitting no other categoryCentrally Mediated Abdominal Pain (CAPS)Rome IV — continuous pain unrelated to gut eventsNarcotic Bowel SyndromeRome IV — opioid-induced hyperalgesia of the gutFaecal Incontinence (Rome IV)Rome IV — the criteria, and why nobody is askedFunctional Anorectal PainLevator ani, unspecified pain and proctalgia fugaxFunctional Defecation DisordersRome IV — dyssynergia and inadequate propulsionInfant RegurgitationRome IV — the happy spitter, and the alarm features that rule it outInfant ColicRome IV — recurrent unexplained crying in a well infant under 5 monthsInfant DyscheziaRome IV — straining before a soft stool, and why not to intervenePaediatric Functional ConstipationRome IV — two of six over one month, with overflow soiling as a criterionToddler's DiarrhoeaRome IV functional diarrhoea of childhood — painless, thriving childPaediatric Cyclic Vomiting SyndromeRome IV — both age bands, with different criteria for eachPaediatric Rumination SyndromeRome IV — infant and child/adolescent criteriaFunctional Nausea & Vomiting (Children)Rome IV — two separate disorders that can be met togetherAerophagiaRome IV — distension that increases through the dayPaediatric Functional DyspepsiaRome IV — four times a month, with PDS and EPS subtypingPaediatric Irritable Bowel SyndromeRome IV — plus the constipation clause clinicians missAbdominal MigraineRome IV — stereotypical incapacitating episodes weeks apartFunctional Abdominal Pain — NOSRome IV — the residual category, reached after the other threeNonretentive Faecal IncontinenceRome IV — soiling without retention, where laxatives make it worseFunctional DyspepsiaRome IV — with PDS and EPS subtypingRumination SyndromeRome IV — effortless regurgitation without retchingCyclic Vomiting SyndromeRome IV — stereotypical episodic vomitingCannabinoid HyperemesisRome IV — CVS pattern relieved by cannabis cessationChronic Nausea & VomitingRome IV — chronic nausea and vomiting syndromeBelching DisordersRome IV — supragastric vs gastric belchingFunctional HeartburnRome IV — heartburn with normal acid exposureReflux HypersensitivityRome IV — normal acid exposure, positive symptom associationFunctional Chest PainRome IV — non-cardiac, non-reflux chest painGlobusRome IV — painless lump-in-throat sensationFunctional DysphagiaRome IV — dysphagia with normal endoscopy and manometry
  1. Calculators
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  3. Rumination Syndrome
Functional GI

Rumination Syndrome

Rome IV — effortless regurgitation without retching

Recently ingested is characteristic — it happens within minutes of eating, typically during or just after the meal, and stops once the material becomes acidic.

The defining criterion. Retching means vomiting, not rumination. Effortless regurgitation is also usually not preceded by nausea, and the regurgitant contains recognisable food that may taste pleasant.

Two criteria only, and the second is the one that matters: regurgitation not preceded by retching. That single feature separates rumination from vomiting and from gastro-oesophageal reflux.

When to use
Use it in any patient describing food coming back up shortly after meals, particularly one already carrying a label of refractory reflux or gastroparesis. That is the population where it pays off, because rumination is routinely misdiagnosed as both and patients spend years on proton pump inhibitors and prokinetics that cannot work on this mechanism. The single question that separates it from everything else — was there retching first — takes seconds and is almost never asked. It is not appropriate where regurgitation is preceded by retching or nausea, where the material is acidic and bitter, or where the timing is hours rather than minutes after eating.
Why use it
Because the diagnosis is cheap to make and the alternative is expensive. Rumination has a distinctive history, an effective behavioural treatment, and no useful pharmacological one — yet patients are typically investigated repeatedly, escalated through acid suppression, offered gastric emptying studies, and occasionally referred for fundoplication before anyone asks about retching. The mechanism is a learned, unconscious contraction of the abdominal wall that raises intragastric pressure and pushes recently eaten food back into the mouth. Once named, it responds to diaphragmatic breathing training, which is quick to teach and works. The barrier is recognition, and that is exactly what a criteria set is good for.
Formula, evidence and interpretation

About the Rome IV Criteria for Rumination Syndrome

Two criteria, and the second does all the diagnostic work. Rome IV requires persistent or recurrent regurgitation of recently ingested food into the mouth with subsequent spitting out or re-chewing and swallowing, and — decisively — that the regurgitation is not preceded by retching. Retching means vomiting; its absence means rumination. Criteria must be fulfilled over three months with onset at least six months ago. Supportive features: the events are usually not preceded by nausea, the regurgitant contains recognisable food that may taste pleasant, and the process stops once the material turns acidic.

On this page

  • Formula
  • Interpreting the result
  • Inputs
  • What it returns
  • How it is calculated
  • Facts & figures
  • Evidence
  • How it compares
  • Pearls & pitfalls
  • Critical actions
  • Why it exists
  • About the creator
  • Limitations
  • If you are the patient
  • FAQ
  • Related calculators
  • References

Formula

Rumination syndrome = BOTH of: persistent or recurrent regurgitation of recently ingested food into the mouth, with subsequent spitting or remastication and swallowing AND regurgitation not preceded by retching AND criteria fulfilled for the last 3 months, onset at least 6 months ago Supportive: effortless regurgitation events, usually not preceded by nausea regurgitant containing recognisable, possibly pleasant-tasting food process ceasing once the regurgitated material becomes acidic
Not preceded by retching
The discriminating criterion. Retching means vomiting, and vomiting is a different disorder entirely.
Effortless
No abdominal straining, no autonomic accompaniment, and typically no nausea beforehand.
Ceases when acidic
The regurgitated material stops being brought back once it becomes acidic, which is why episodes cluster in the first hour after eating.
  • The absence of retching is the discriminating criterion and separates rumination from vomiting at the bedside.
  • Rome IV added the supportive features to make the bedside distinction from reflux easier.

Interpreting the result

Meeting the criteria should change the prescription immediately. Diaphragmatic breathing is first-line and highly effective: it works because diaphragmatic breathing and the abdominal wall contraction that drives rumination are mechanically incompatible, so a patient practising it after meals cannot ruminate. It can be taught in a single consultation and reinforced by a behavioural or speech and language therapist. At the same time, stop the proton pump inhibitors and prokinetics the patient has usually accumulated — they treat mechanisms that are not operating, and continuing them alongside the real treatment muddies whether it is working. Explanation matters unusually much here, because patients are frequently unaware they are doing it, and a description that sounds like an accusation of a deliberate habit or an eating disorder will lose them. Where doubt remains, high-resolution impedance manometry confirms the diagnosis by demonstrating the abdominal pressure rise preceding retrograde flow. If the answer to the retching question is yes, this is vomiting and the assessment moves to the nausea and vomiting disorders instead.

ScoreBandWhat it meansAction
Both criteria metRumination syndromeEffortless post-prandial regurgitation of recognisable food without retching — a behavioural disorder of abdominal wall contractionTeach diaphragmatic breathing; stop acid suppression and prokinetics; refer for behavioural therapy if needed
Retching precedes the eventCriteria not met — this is vomitingThe presence of retching excludes rumination and points to a nausea and vomiting disorderAssess for chronic nausea and vomiting syndrome or cyclic vomiting syndrome instead
Other criterion unmetCriteria not metTiming rule or the regurgitation criterion unsatisfiedClarify the history — timing relative to meals and the nature of the material

What the Rumination Syndrome needs (3 inputs)

Timing
Criteria fulfilled for the last three months with symptom onset at least six months before diagnosis.
Persistent or recurrent regurgitation of recently ingested food, with spitting out or re-chewing and swallowing
Recently ingested is characteristic — typically within minutes, often during or immediately after the meal. The re-chewing and re-swallowing is the feature patients are most reluctant to describe and most relieved to have named.
Regurgitation is NOT preceded by retching
The decisive criterion. Retching indicates vomiting and takes the patient out of this diagnosis entirely. Effortless is the operative word: the material simply appears, without warning and without effort.

What it returns

Criteria met or not met
Both criteria plus the timing rule must hold.
Which criterion remains outstanding
Named explicitly. A failure on the retching criterion means a different disorder rather than an incomplete assessment.

How it is calculated

Rumination is a behaviour rather than a disease of the gut. After a meal, an unconscious contraction of the abdominal wall musculature raises intragastric pressure above the pressure at the lower oesophageal sphincter, and recently swallowed food — still non-acidic, still recognisable — moves back into the mouth. Because the movement is driven by a voluntary muscle group acting reflexively, there is no retching, no nausea, and no autonomic prodrome. The behaviour is typically learned unconsciously, often after a period of genuine reflux or vomiting, and then persists after the original trigger has gone. That mechanism explains the two Rome IV criteria precisely: the timing and character of the regurgitant follow from the pressure event, and the absence of retching follows from the fact that no emetic reflex is involved. It also explains why acid suppression does nothing — the problem is mechanical and behavioural, not chemical.

Facts & figures

Rumination, reflux and vomiting — the discriminating features
FeatureRuminationRefluxVomiting
Preceded by retchingNo — decisiveNoYes
Preceded by nauseaUsually notNoUsually
Timing after eatingMinutes; during or just after the mealVariable, often later or on lying flatVariable
Nature of materialRecognisable food, may taste pleasantAcidic or bitter fluidGastric contents, acidic
Stops whenThe material turns acidicDoes not follow this patternThe episode ends
Responds toDiaphragmatic breathing; behavioural therapyAcid suppressionDepends on cause

Asking whether the event is preceded by retching takes seconds and separates rumination from vomiting outright. It is the single most useful question in this presentation and is almost never asked.

Evidence

Derivation — Rome Foundation, gastroduodenal disorders committee

2016

Consensus criteria from the Rome IV gastroduodenal disorders committee, published in Gastroenterology in 2016.

Consensus-derived. Rome IV retained the absence of retching as the discriminating criterion and added supportive features — the regurgitant containing recognisable, possibly pleasant-tasting food, and the process ceasing once the material becomes acidic — that help separate rumination from reflux at the bedside.

Diagnosis and treatment review — Halland 2018

2018

Clinical review setting out the diagnosis and treatment of rumination syndrome, including the role of high-resolution impedance manometry and diaphragmatic breathing.

Established diaphragmatic breathing as first-line therapy and described impedance manometry findings — a rise in intragastric pressure preceding retrograde flow — that confirm the diagnosis where the history is equivocal.

How it compares

Rumination Syndrome vs Gastro-oesophageal reflux disease

The commonest misdiagnosis — rumination brings up recognisable, non-acidic food within minutes of eating, and does not respond to acid suppression because acid is not the mechanism.

Patients with rumination are typically labelled with refractory reflux and escalated through proton pump inhibitors, and a proportion reach consideration for fundoplication — an operation that cannot address a behavioural abdominal wall contraction. The distinguishing features are all in the history: timing within minutes of eating rather than later or on lying flat; recognisable food rather than acidic fluid; a taste that may be pleasant rather than bitter; and cessation once the material turns acidic. Reflux monitoring in a ruminating patient can be misleading, since the retrograde flow is real even though its mechanism is not reflux.

Rumination Syndrome vs Chronic nausea and vomiting syndrome

Mutually exclusive — Rome IV requires rumination to be excluded before chronic nausea and vomiting syndrome can be diagnosed, and the separator is retching.

Chronic nausea and vomiting syndrome lists the exclusion of rumination among its criteria explicitly, precisely because patients describe both as 'vomiting'. The separator is whether retching precedes the event, supported by whether nausea does. Getting this wrong sends a patient with a behavioural disorder that responds to breathing training down a pathway of anti-emetics and gastric emptying studies that will not help. The direction of error is almost always the same — rumination mislabelled as vomiting rather than the reverse.

Open the Chronic nausea and vomiting syndrome calculator →

Rumination Syndrome vs Gastroparesis

Both produce post-prandial upper GI symptoms, but rumination brings food up within minutes with no retching, while gastroparesis is defined by delayed emptying and typically involves nausea and vomiting.

Rumination is a frequent alternative explanation in patients labelled gastroparetic, particularly where the gastric emptying study is normal or borderline and the symptoms have not responded to prokinetics. The histories differ clearly once the right questions are asked: rumination occurs within minutes of eating, without nausea or retching, with recognisable food; gastroparesis involves fullness, nausea and vomiting of retained gastric contents, often hours later. Where both are suspected, high-resolution impedance manometry distinguishes them by showing the abdominal pressure event that characterises rumination.

Halland M, Pandolfino J, Barba E. Diagnosis and Treatment of Rumination Syndrome. Clin Gastroenterol Hepatol. 2018;16(10):1549-1555.

Pearls & pitfalls

  • Ask whether retching comes first. It is the whole diagnosis, it takes seconds, and it is almost never asked.
  • Rumination is routinely misdiagnosed as refractory reflux or as gastroparesis. Patients typically arrive on a proton pump inhibitor and a prokinetic, neither of which can work on this mechanism.
  • The material is recognisable food, often pleasant-tasting, not acidic fluid. Patients confirm this readily but rarely volunteer it.
  • The process stops once the regurgitant turns acidic, which is why episodes cluster in the period immediately after eating rather than continuing indefinitely.
  • Patients are usually unaware they are doing it. Describing it as a habit or implying deliberateness will lose their confidence — it is an unconscious reflex, not a choice.
  • It is not an eating disorder, though it can coexist with one. Handling this distinction carelessly is a common way to make a patient defensive.
  • Diaphragmatic breathing works because it is mechanically incompatible with the abdominal contraction that causes rumination. Explaining that makes patients far more likely to practise it.
  • High-resolution impedance manometry confirms the diagnosis where doubt remains, by showing the intragastric pressure rise preceding retrograde flow.
  • Do not continue acid suppression 'just in case' alongside behavioural treatment — it obscures whether the real treatment is working.

Critical actions

  • Ask directly whether the regurgitation is preceded by retching or nausea, and how soon after eating it happens.
  • Ask what the material tastes like and whether it contains recognisable food — patients confirm this immediately when asked and rarely mention it otherwise.
  • Teach diaphragmatic breathing at the point of diagnosis and have the patient practise it after meals.
  • Stop proton pump inhibitors and prokinetics prescribed for presumed reflux or gastroparesis.
  • Refer to a behavioural therapist or speech and language therapist experienced in rumination where breathing training alone is insufficient.
  • Explain the mechanism explicitly and non-judgementally, making clear it is unconscious rather than deliberate.
  • Consider high-resolution impedance manometry where the history is equivocal or the patient is not improving.
  • Screen for coexisting eating disorder and for the anxiety that frequently accompanies this, without conflating either with the diagnosis.

Why this score exists

Rumination was for a long time regarded as a disorder of infants and of people with intellectual disability, and its recognition in otherwise healthy adults is comparatively recent. That history explains why it is still missed: clinicians trained to associate it with those populations do not consider it in an adult presenting with what sounds like reflux. The Rome IV committee's contribution was to keep the criteria deliberately short — two items — and to load the diagnostic weight onto the single feature that cannot be confused with anything else. The supportive criteria do the rest of the work informally, and they are unusually practical for a Rome document: recognisable food, a possibly pleasant taste, and cessation once the material turns acidic are all things a patient will confirm immediately if asked, and none of them fits reflux or vomiting.

About the creator

  • Vincenzo Stanghellini

    First author, Rome IV gastroduodenal disorders committee

    Chaired the committee that produced the Rome IV gastroduodenal criteria.

  • Jan Tack

    Co-author, Rome IV gastroduodenal disorders committee

    Co-authored the chapter and contributed to the physiological characterisation of rumination in adults.

Limitations

  • Entirely history-based, and the history is one patients find embarrassing to give fully, so under-reporting is common.
  • Only two criteria, which makes the diagnosis dependent on the accuracy of a single question about retching.
  • The distinction from regurgitant reflux can be genuinely difficult where the history is atypical, and impedance manometry is not widely available.
  • A consensus definition; the absence of retching is a bedside discriminator agreed by experts rather than one tested against manometry in a diagnostic accuracy study.
  • Does not address the overlap with eating disorders, which is real, clinically important and not covered by the criteria.
  • Says nothing about severity or about the nutritional consequences that occur in a minority with frequent spitting out.
  • The evidence base for treatment, while consistent, rests on relatively small studies of behavioural intervention.
  • Rome IV's paediatric criteria for rumination differ, so the adult set should not be applied to children.

If you are the patient

Rumination syndrome means food comes back up into your mouth shortly after eating — usually within minutes — without any retching or heaving beforehand, and often without feeling sick at all. The food is still recognisable and may even taste normal or pleasant, which is quite different from reflux, where what comes up is acidic and unpleasant. You might then spit it out or chew and swallow it again, sometimes without really noticing you are doing it. What is happening is that the muscles of your abdominal wall are tightening unconsciously after a meal, squeezing the stomach and pushing food back up. It is not deliberate, it is not an eating disorder, and it is not something you are doing on purpose — most people are genuinely surprised when it is explained. The good news is that the treatment is simple and works well: learning a particular way of breathing using the diaphragm, practised after meals, physically prevents the squeeze that causes it. Many people improve substantially with this alone. If you are currently on acid-reducing tablets or medicines to speed up the stomach, your doctor will probably stop them, because they treat something that is not the problem here.

Frequently asked questions

What are the Rome IV criteria for rumination syndrome?#

Persistent or recurrent regurgitation of recently ingested food into the mouth with subsequent spitting out or re-chewing and swallowing, and regurgitation that is not preceded by retching. Both must be fulfilled for the last three months with symptom onset at least six months before diagnosis.

How is rumination different from vomiting?#

Retching. Vomiting is preceded by retching and usually by nausea; rumination is effortless and preceded by neither. That single question separates the two and is the reason the Rome IV criteria are only two items long. The material also differs: rumination brings up recognisable, often non-acidic food, whereas vomit is acidic gastric content.

How is rumination different from reflux?#

Timing and content. Rumination occurs within minutes of eating and brings up recognisable food that may taste pleasant, stopping once the material turns acidic. Reflux tends to occur later or on lying flat and produces acidic, bitter fluid. Crucially, rumination does not respond to acid suppression, because acid is not the mechanism — it is a behavioural contraction of the abdominal wall.

What causes rumination syndrome?#

An unconscious, learned contraction of the abdominal wall muscles after eating, which raises pressure in the stomach above that in the lower oesophageal sphincter and pushes recently swallowed food back into the mouth. It often begins after a period of genuine reflux or vomiting and then persists as a reflex after the original trigger has resolved.

How is rumination syndrome treated?#

Diaphragmatic breathing is first-line and is highly effective. It works because diaphragmatic breathing and the abdominal wall contraction that drives rumination are mechanically incompatible — a patient breathing that way after meals cannot ruminate. Where breathing training alone is insufficient, referral to a behavioural or speech and language therapist experienced in rumination is the next step. Acid suppression and prokinetics do not help and should be stopped.

Is rumination syndrome an eating disorder?#

No, although the two can coexist and should be assessed separately. Rumination is an unconscious reflex, not a deliberate behaviour, and patients are frequently unaware they are doing it. Framing it as a habit or implying intent is a common way to lose a patient's confidence, and it misrepresents the mechanism.

Do you need a test to confirm rumination syndrome?#

Usually not — the history is distinctive enough when the right questions are asked. Where doubt remains or the patient is not improving, high-resolution impedance manometry confirms the diagnosis by demonstrating the rise in intragastric pressure that precedes retrograde flow, which is the mechanical signature of rumination and does not occur in reflux or vomiting.

Why is rumination syndrome so often missed?#

Because it was historically regarded as a disorder of infants and of people with intellectual disability, so it is not considered in otherwise healthy adults; and because the one question that identifies it — whether retching comes first — is rarely asked. Patients are commonly labelled with refractory reflux or gastroparesis and treated for years with drugs that cannot address a behavioural mechanism.

Related calculators

  • Chronic Nausea & Vomiting — Rome IV — chronic nausea and vomiting syndrome
  • Functional Dyspepsia — Rome IV — with PDS and EPS subtyping
  • Belching Disorders — Rome IV — supragastric vs gastric belching
  • Cyclic Vomiting Syndrome — Rome IV — stereotypical episodic vomiting
  • Functional Heartburn — Rome IV — heartburn with normal acid exposure

References

Original / primary reference

  1. Stanghellini V, Chan FKL, Hasler WL, Malagelada JR, Suzuki H, Tack J, Talley NJ. Gastroduodenal Disorders. Gastroenterology. 2016;150(6):1380-1392 (Rome IV).

Diagnosis and treatment

  1. Halland M, Pandolfino J, Barba E. Diagnosis and Treatment of Rumination Syndrome. Clin Gastroenterol Hepatol. 2018;16(10):1549-1555.

Clinical practice update

  1. Moshiree B, Drossman D, Shaukat A. AGA Clinical Practice Update on Evaluation and Management of Belching, Abdominal Bloating, and Distention: Expert Review. Gastroenterology. 2023;165(3):791-800 (covers the rumination differential).

Last updated July 31, 2026. Clinical knowledge base written and curated by GastroAGI Team from primary medical literature.

Written from primary literature and not yet independently clinically reviewed.

For use by qualified healthcare professionals. This calculator supports clinical judgement and does not replace it.