Causes

The precise cause of rumination syndrome isn't clear. But it appears to be caused by an increase in abdominal pressure.

Rumination syndrome is frequently confused with bulimia nervosa, gastroesophageal reflux disease (GERD) and gastroparesis. Some people have rumination syndrome linked to a rectal evacuation disorder, in which poor coordination of pelvic floor muscles leads to chronic constipation.

The condition has long been known to occur in infants and people with developmental disabilities. It's now clear that the condition isn't related to age, as it can occur in children, teens and adults. Rumination syndrome is more likely to occur in people with anxiety, depression or other psychiatric disorders.