Rumination Disorder

Rumination disorder is defined as the repeated regurgitation of food for a period of at least 1 month following a period of previously normal functioning.
The regurgitated food may be subsequently rechewed, reswallowed, or spit out.
Regurgitation is typically a frequent, daily occurrence, but notably, it does not occur during sleep.
The behavior must not be attributable to an associated gastrointestinal illness (e.g., gastroesophageal reflux, pyloric stenosis) or another underlying medical condition.
The diagnosis is excluded if the behavior occurs exclusively during the course of anorexia nervosa, bulimia nervosa, binge-eating disorder, or avoidant/restrictive food intake disorder.

In otherwise healthy children, the disorder typically emerges in the first year of life, generally between 3 and 12 months of age.
Infants classically display a characteristic posturing that involves straining, arching the back, and holding the head back while making rhythmic sucking movements with their tongue.
Weight loss and failure to achieve expected weight gain are common and prominent features in affected infants.
Older children, adolescents, and adults may attempt to hide the regurgitation behavior or deliberately avoid eating in the presence of others due to social stigma.
Protracted rumination can lead to life-threatening malnutrition, profound growth delay, and severe negative effects on overall development and learning potential.

Category	High-Yield Clinical Points
Risk Factors	Strongly associated with a disturbed relationship with primary caregivers, lack of an appropriately stimulating environment, neglect, and stressful life situations. Often functions as a learned behavior reinforced by pleasurable sensations, distraction from negative emotions, or inadvertent attention from caregivers.
Differential Diagnosis	Structural and functional gastrointestinal anomalies, including pyloric stenosis, Sandifer syndrome, gastroparesis, and hiatal hernia. Central nervous system etiologies, including increased intracranial pressure and diencephalic tumors. Systemic conditions such as inborn errors of metabolism and adrenal insufficiency.

The initial step is a comprehensive behavioral analysis to determine whether the rumination serves a self-stimulating purpose or is primarily socially motivated.
The core behavioral treatment focuses on actively reinforcing correct eating behavior while minimizing caregiver attention directed toward the rumination.
Therapeutic techniques such as diaphragmatic breathing and postprandial gum chewing have demonstrated efficacy as competing responses in older children and adolescents.
Aversive conditioning techniques (e.g., withdrawing positive attention or introducing sour/bitter flavors during regurgitation) may be considered if the child's health is severely jeopardized.
There is currently no evidence supporting the use of psychopharmacologic interventions for the specific treatment of rumination disorder.
In severe, intractable cases presenting with life-threatening malnutrition or dehydration, admission to an intensive integrated medical-behavioral inpatient program is required.