Rumination By Jonathan Gotfried, MD, Lewis Katz School of Medicine at Temple University Reviewed / Revised Jan 2022 | Modified Sep 2022 View Patient Education Etiology Symptoms and Signs Diagnosis Treatment Rumination is the (usually involuntary) regurgitation of small amounts of food from the stomach (most often 15 to 30 minutes after eating) that are rechewed and, in most cases, again swallowed.