Continuing Education Activity

Rumination disorder is a functional gastrointestinal disorder characterized by painless, effortless, rapid postprandial regurgitation of recently ingested food into the mouth without associated nausea or retching. This regurgitation is typically followed by remastication, expectoration, or reswallowing of undigested food. Symptoms may occur within 10 to 15 minutes after eating, and can persist for up to 2 hours, affecting both children and adults. Because misdiagnosis as a vomiting disorder or gastroesophageal reflux disease frequently delays appropriate care and leads to unnecessary testing, this course reviews appropriate diagnostic evaluation, which relies primarily on clinical criteria from Rome IV or the Diagnostic and Statistical Manual of Mental Disorders, 5th edition (DSM-5), and is supported when necessary by studies, such as endoscopy, postprandial combined esophageal pH-Impedance monitoring and manometry, or eating disorder assessments. The management of this condition includes patient education, reassurance, diaphragmatic breathing, behavioral therapy, and selective pharmacologic therapy for refractory cases.

This activity will help participants gain an in-depth understanding of the protocol for conducting targeted histories, the comorbidities associated with rumination syndrome, the selection of appropriate testing, and recommended therapeutic interventions. Implementing an appropriate interprofessional approach when managing this condition may ultimately reduce patient distress and improve outcomes.

Objectives:

• Identify the typical presentation of a patient with rumination disorder.
• Differentiate the pathophysiology of rumination disorder from similar functional gastrointestinal disorders.
• Implement the recommended treatment plan for patients with rumination syndrome.
• Coordinate management strategies with interprofessional team members to improve care coordination and outcomes in patients with rumination disorder.

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Introduction

Rumination syndrome is a functional gastrointestinal disorder characterized by the repetitive, painless, effortless regurgitation of recently ingested food from the stomach back into the oral cavity in the absence of organic disease. Regurgitation is followed by remastication and expectoration (or reswallowing) of undigested food. Regurgitation usually occurs soon after finishing a meal, and symptoms can persist for up to 2 hours.[1]

Rumination syndrome can occur in both children and adults and is classified as a functional gastrointestinal disorder by the Rome IV criteria and as an eating disorder according to the Diagnostic and Statistical Manual of Mental Disorders, 5th edition (DSM-5).[2] Rumination syndrome is often misdiagnosed as gastroesophageal reflux disease or other recurrent vomiting disorders, including functional vomiting or gastroparesis, resulting in unnecessary testing and treatments and delaying therapies that alleviate the problem.[3]

Etiology

The etiology of rumination syndrome is likely multifactorial; however, the exact causes are poorly understood. Several risk factors have been associated with the condition,[4][5] which include the following:

• Emotional neglect (in infants)
• A history of abuse in as many as 33% of affected individuals [5]
• Eating disorders [5]
• Emotional stress [6]
• Presence of mental health diagnoses such as obsessive-compulsive disorder, anxiety, depression, adjustment disorder, somatoform disorder, adaptation disorder, post-traumatic stress disorder, and attention deficit-hyperactivity disorder (ADHD)[7][8][9]
• Fibromyalgia [10]
• Rectal evacuation disorder [11]

Epidemiology

The exact prevalence and incidence of rumination syndrome are uncertain, as diagnostic criteria vary across clinical settings. Rumination syndrome is likely greatly underdiagnosed due to a lack of recognition by both clinicians and affected individuals.[12] An accurate diagnosis can take years, and the patient may see numerous clinicians, leading to sparse, inaccurate data.[13] Furthermore, patients commonly report vomiting, abdominal pain, and symptoms compatible with avoidant or restrictive food intake disorders, making the diagnosis of rumination syndrome particularly difficult.[14][15] Rumination syndrome occurs across all age groups and in all cognitive functional levels.[16] Results from the Rome Foundation Global Epidemiology Study found that the prevalence of rumination syndrome was 3.1%, with 54.5% of cases in women and 45.5% in men, and a mean age at onset of 44.5 years.[17]

Data on prevalence and incidence are conflicting. Lewis et al used online questionnaires to assess for symptoms suggestive of rumination syndrome, with 949 responses collected, of which none reported rumination.[18] In contrast, Rajindrajith et al reported a prevalence of 5.1% in a Sri Lankan population-based study involving more than 2000 children aged 10 to 16 years, evenly distributed between boys and girls.[19][20] Findings from a recent meta-analysis reported that rumination is more prevalent in adults than in children and, in adults, is characteristically associated with female sex, increased body mass index, anxiety, and depression.[21]

Pathophysiology

Rumination syndrome is believed to be an unintentionally acquired habit, possibly a learned adaptation of the belch reflex.[22] The pathophysiology of rumination syndrome is not entirely understood and includes multiple overlapping mechanisms. Delayed gastric emptying, increased gastric perception, and duodenal eosinophilia have been proposed as underlying factors in rumination, and stressful life events may precede the onset of symptoms in some patients.[23]

The primary mechanism of rumination is the development of elevated intra-abdominal pressure induced by voluntary abdominal contraction, which causes movement of gastric contents into the esophagus.[13] Concomitant chest expansion results in negative intrathoracic pressure.[9] These changes, along with a proposed relaxation of the diaphragm, the gastric fundus, and the upper and lower esophageal sphincters, increase intragastric pressure, facilitating the retrograde flow of food into the esophagus and the oral cavity.[24][25]

Secondary rumination describes events in which spontaneous episodes of gastroesophageal reflux cause a response of abdominal straining. Pressures involved in the pathophysiology of gastroesophageal reflux disease are unlikely to reach the levels seen in primary rumination; however, gastroesophageal reflux disease may trigger secondary rumination in younger patients.[26][27] Supragastric belching preceding regurgitation is a trigger for a third type of rumination event. Finally, rumination associated with bulimia nervosa has been described.[28]

The maintenance of rumination is often associated with psychosocial disorders. Results from several smaller studies indicated that many patients with rumination syndrome have a higher burden of underlying somatic disorders, depression, or anxiety.[13][29] Rumination might be maintained because it provides pain relief or aids weight control.[30] A pathophysiologically distinct subtype of rumination syndrome is infantile rumination, which is related to emotional neglect.[31][32]

Histopathology

Little is known about the significance of histopathological changes in patients with rumination syndrome. Halland et al obtained 22 duodenal biopsies from patients with rumination syndrome and compared the numbers of eosinophils and intraepithelial lymphocytes with those in controls.[33] Histological analysis indicated that patients with rumination syndrome have mild eosinophilia and a higher number of intraepithelial lymphocytes compared to controls. Friesen et al confirmed these histological findings in young patients; additionally, they identified an increased number of gastric antral eosinophils and mast cells. The histological changes suggest a possible inflammatory component in patients with rumination syndrome. However, the exact mechanism and molecular pathways involved remain unknown.[34] 

History and Physical

Patients with rumination syndrome commonly report dyspepsia and vomiting. The syndrome is characterized by rapid-onset postprandial regurgitation, usually within 10 minutes of finishing a meal, usually without abdominal pain or preceding nausea. Regurgitation can persist for 1 to 2 hours after a meal. The most common reasons for referrals to gastroenterologists include suspected diagnoses of gastroparesis, recurrent vomiting of unknown origin, and refractory gastroesophageal reflux disease.[35] Symptoms are usually chronic, and a diagnosis of rumination syndrome may take, on average, 21 to 77 months to reach.[36] Eating and feeding disorders should be considered, and severe weight loss and malnutrition are uncommon in primary rumination syndrome unless underlying eating disorders are present.

Obtaining a detailed history is essential, as many patients are unable to differentiate between vomiting and regurgitation. Vomiting is a forceful action in which the individual cannot keep the vomitus within the oral cavity. Regurgitation is usually effortless without gagging or retching, and the individual can keep the regurgitant within the oral cavity. If expectoration occurs, it is voluntary. Nausea is generally absent, and the regurgitant is usually undigested, recognizable, and initially pleasant in taste. Regurgitation and reswallowing are usually repeated until the gastric contents become acidic or bilious and distasteful.[37] Some patients can predict the onset of regurgitation as they have an impending abdominal pain known as the premonitory urge, which can be severe enough to result in physical distress. Frequent regurgitation can also result in significant weight loss and dehydration.[35] The medical history commonly includes depression, anxiety, and somatic disorders. Symptoms of gastroesophageal reflux disease (GERD) do not exclude the diagnosis. Physical findings are nonspecific and may be absent. Dental erosions are not unusual, and although signs of weight loss and malnutrition are not typical, the frequency of these findings remains higher in patients with rumination syndrome than in healthy age-matched controls.[38]

Evaluation

According to the Rome IV criteria for rumination syndrome, a diagnosis can be made on clinical grounds without invasive testing. In contrast, the DSM-5 criteria require that repeated regurgitation not be due to a medical condition, which is most often diagnosed by testing to exclude other causes. Moreover, because many patients wait years for an accurate diagnosis, some patients are disappointed by a diagnosis of a functional gastrointestinal disorder, and objective testing can help patients better comprehend the diagnosis of rumination syndrome.[5][39] The evaluation should be individualized to the patient's needs and based on the clinical history and underlying comorbid conditions.

Combined Esophageal pH-Impedance Monitoring and Manometry

Postprandial combined esophageal pH-impedance monitoring and manometry is the gold-standard test for confirming the diagnosis of rumination when the clinical presentation is unclear. The diagnosis is confirmed if there is evidence of reflux extending to the proximal esophagus, combined with an abdominal peak pressure exceeding 30 mm Hg in adults (25 mm Hg in children)[40] and a gastro-sphincteric pressure of 2 mm Hg just before the episode.[41] The study is also helpful in identifying rumination variants. Primary rumination is identified by an increase in abdominal pressure preceded by the retrograde flow, and secondary rumination is identified as an increase in abdominal pressure after the onset of a reflux event. The recommended evaluation of patients with suspected rumination syndrome includes:

• Assessment for potential underlying eating disorders (bulimia nervosa, anorexia nervosa)
• Endoscopy or CT enterography to exclude mechanical obstruction
• High-resolution esophageal manometry (HRIM) with impedance testing. Approximately 20% of adults diagnosed with GERD but who did not respond to proton pump inhibitors displayed a rumination profile on postprandial high-resolution impedance manometry [42]
• Gastric emptying and pH studies are not necessary for diagnosis, but they are recommended if clinical symptoms are atypical and underlying conditions (eg, refractory GERD or gastroparesis) must be identified or excluded
• Blood testing for electrolyte abnormalities; however, electrolyte abnormalities are uncommon unless there is a concurrent eating disorder.

DSM-5 Criteria for Rumination Syndrome

• Repeated regurgitation of food for at least 1 month
• Regurgitation should occur after feeding or eating, and food may be rechewed, reswallowed, or expectorated
• Regurgitation occurs several times per week, usually daily
• No retching, nausea, or disgust
• Repeated regurgitation is not due to an underlying general medical condition (eg, GERD or pyloric stenosis)
• The behavior does not occur exclusively in the course of anorexia nervosa, bulimia nervosa, binge-eating disorder, or avoidant or restrictive food intake disorder
• If occurring in the presence of another mental disorder (eg, intellectual developmental disorder) or general medical condition (including pregnancy), the rumination syndrome is severe enough to warrant additional clinical attention [43]

ROME IV Criteria for Rumination Syndrome in Adults

 Must include all of the following:

• Regurgitation of food back up into the mouth at least 2-3 times a month
• Retching or heaving before regurgitation should rarely or never occur
• These criteria should be fulfilled for the past 3 months, and symptoms should have begun at least 6 months before the diagnosis is made

Supportive factors to distinguish rumination from reflux:

• Regurgitated material should contain recognizable food, and it may have a pleasant taste
• Symptoms tend to cease once the regurgitant becomes acidic (when it tastes sour or bitter)
• Heartburn should not be present in the absence of concurrent gastroesophageal reflux
• Esophageal manometry combined with impedance monitoring can be used to objectively diagnose rumination [Gastroenterology, Gastroduodenal Disorders. 2026][3] 

ROME IV Criteria in Pediatrics

Neonate and toddler

Must include all of the following for at least 2 months:

• Repetitive contractions of the abdominal muscles, diaphragm, and tongue
• Effortless regurgitation of gastric contents, which are either expelled from the mouth or rechewed and reswallowed

Three or more of the following:

1.  Onset between 3 and 8 months
2.  Does not respond to management for gastroesophageal reflux disease and regurgitation
3.  Unaccompanied by signs of distress
4.  Does not occur during sleep or when the infant is interacting with individuals in the environment

Children and adolescents

Must include all of the following for at least 2 months:

• Repeated regurgitation and rechewing or expulsion of food that begins soon after ingestion of a meal
• Does not occur during sleep
• Not preceded by retching [44]

After appropriate evaluation, if the symptoms cannot be fully explained by another medical condition, an eating disorder must be excluded.

Treatment / Management

The initial treatment of patients with rumination syndrome consists of education about the disease course, reassurance, and behavioral modifications to reduce regurgitation episodes. Behavioral modification is the most commonly used method for managing rumination, eliminating the behavior in up to 66% of affected patients and reducing its frequency by up to 55%.[45] Education and reassurance support adherence to behavioral modification and can reduce symptom-related distress.

Diaphragmatic Breathing

Diaphragmatic breathing is often effective in managing secondary rumination syndrome. Diaphragmatic breathing works by initiating a competing mechanism to the acquired, unperceived contractions of the abdominothoracic muscles. The patient is instructed to sit in a chair and place one hand on the chest and the other on the abdomen. During breathing, only the hand on the abdomen is allowed to move, with 6 to 8 slow, deep breaths per minute. The patient inhales, contracting the diaphragm and expanding the abdomen. Diaphragmatic breathing should be initiated after a meal or upon signs of regurgitation. The effects of diaphragmatic breathing can be visualized via electromyography or HRIM. Biofeedback helps some patients objectively assess the method.[9] Referral to a behavioral therapist for augmentation strategies (general relaxation and gum chewing) and to a cognitive-behavioral therapist for rumination disorder can be used as adjuncts.[46][47][48]

Medical Therapy 

Limited data are available concerning medical therapy for rumination syndrome. Generally, pharmacotherapy for rumination syndrome should be reserved for patients who do not respond to initial management with behavioral therapy. Baclofen 10 mg 3 times daily reduces postprandial flow events and improves patient-reported rumination symptoms.[49][50] Baclofen counteracts transient lower esophageal sphincter relaxations by increasing the basal lower esophageal sphincter pressure, thereby limiting regurgitation episodes.[51] Results from a crossover study of functional dyspepsia showed that buspirone improved relaxation of the gastric fundus, suggesting potential benefit in patients with rumination syndrome.[32] There are no specific studies evaluating the use of buspirone in rumination syndrome, but an expert review supported a trial of buspirone in refractory cases.[52]

Nutritional Support

Given that the diagnosis of rumination syndrome is often delayed by several years, careful evaluation of nutritional status and weight trajectories is essential. In a recent retrospective cohort of 133 underweight individuals with rumination syndrome, 23 patients ultimately required jejunostomy tube (J-tube) placement.[53] J-tubes were maintained for an average of 16 weeks and were associated with a substantial mean weight gain of 38.8 pounds. These findings underscore the therapeutic value of an integrated management strategy in more severe cases, in which J-tube feedings not only support weight restoration and stabilization but also enhance symptom control, promote engagement in behavioral therapies, and improve long-term quality of life.

Differential Diagnosis

Differential diagnoses that should be considered when evaluating patients with clinical features of rumination disorder include:

• Vomiting (to be distinguished from regurgitation)
• Gastroparesis
• Cyclical vomiting syndrome
• GERD
• Functional dyspepsia
• Eating disorders (anorexia nervosa, bulimia nervosa)
• Achalasia
• Aerophagia
• Belching disorders
• Esophagogastric junction outflow obstruction

Prognosis

Rumination syndrome is considered an acquired habit and is therefore reversible. Diaphragmatic breathing has been shown in multiple studies to reduce regurgitation. Additionally, pharmacotherapy (baclofen and possibly buspirone) and nonpharmacologic treatment modalities (cognitive behavioral therapy, general relaxation, chewing gum) are available. There are no data to show that rumination syndrome is associated with decreased survival. However, rumination syndrome can be associated with weight loss and social anxiety with avoidant behaviors.

Results from a 2018 study evaluating 47 adolescents with rumination syndrome over 12 months showed continued improvement in rumination symptoms, with cessation for at least 6 months in 20% of patients. The study investigators concluded that intensive behavioral treatment for rumination syndrome can lead to long-term improvement in symptoms, discontinuation of supplemental nutrition, reduced somatic symptoms, and overall improvements in quality of life. Treatment duration may need to be extended in other patients.[54]

Complications

Rumination syndrome is generally considered a benign condition, but it can cause mental and physical distress, affecting quality of life. Frequent regurgitation can also result in significant weight loss, especially in adolescents, and may lead to a diagnosis of an eating disorder that is misattributed to or combined with rumination syndrome. Furthermore, electrolyte disturbances and dental damage have been described, but these complications are more frequently seen in cases refractory to therapy. Patients with rumination syndrome often have accompanying anxiety, depression, and somatization, necessitating long-term cognitive behavioral therapy to help reduce symptoms.

Consultations

Consultations for rumination syndrome include:

• Gastroenterologists often are the first consultants to evaluate patients and to reach the diagnosis
• Psychologists or behavioral therapists have an essential role in the management of the condition
• Dietitians may be needed if significant weight loss and malnutrition occur, particularly in adolescents, who require oral or enteral nutrition
• Surgeons may be consulted in rare situations in which foregut surgical procedures, such as a Nissen fundoplication, might be required.[55]

Deterrence and Patient Education

A proper clinical interview and correct differentiation between vomiting and regurgitation are essential. Rumination syndrome is severely underdiagnosed, most likely related to mislabeling regurgitation as vomiting. Differentiating between vomiting and regurgitation can help establish the diagnosis sooner and prevent prolonged symptoms in patients. Because most patients wait years for an accurate diagnosis, patient education about the benign course and nonpharmacologic treatment options, such as diaphragmatic breathing, is crucial to support patient understanding of the disease and promote adherence to behavioral modifications. Prolonged intensive cognitive-behavioral therapy is often required, and patients often require repeated training to learn the diaphragmatic breathing pattern. Consistent patient education regarding the disease and behavioral modifications is essential for improving patient symptoms.[54]

Enhancing Healthcare Team Outcomes

Rumination disorder is a functional gastrointestinal disorder characterized by effortless, rapid postprandial regurgitation of recently ingested food, typically occurring within minutes of eating and lasting up to 2 hours. This disorder affects children and adults and is frequently misdiagnosed as gastroesophageal reflux disease or vomiting, leading to unnecessary testing and delayed treatment. Diagnosis relies on careful history-taking, Rome IV or DSM-5 criteria, and selective use of studies such as postprandial esophageal pH-impedance monitoring and manometry when needed. Management emphasizes education, diaphragmatic breathing, behavioral therapy, and, in refractory cases, targeted pharmacotherapy options.

Optimal care requires clinicians to refine diagnostic skills, recognize characteristic regurgitation patterns, and differentiate rumination from other gastrointestinal disorders. Clinicians guide evaluation, initiate first-line behavioral strategies, and coordinate specialist involvement. Nurses reinforce diaphragmatic breathing techniques, monitor symptom patterns, and support patient education. Pharmacists assist with medication assessment in refractory cases and help identify interactions or adherence concerns. Collaboration among behavioral health professionals enhances treatment adherence and addresses comorbid psychological conditions. Effective interdisciplinary communication and coordinated follow-up improve diagnostic accuracy, promote patient engagement, and strengthen overall patient safety and outcomes.

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Disclosure: Alexander Kusnik declares no relevant financial relationships with ineligible companies.

Disclosure: Eric Goosenberg declares no relevant financial relationships with ineligible companies.