Regurgitation is the spitting up of food from the esophagus or stomach without nausea or forceful contractions of the abdominal muscles. Rumination is regurgitation with no apparent physical cause. A ring-shaped muscle sphincter between the stomach and esophagus normally helps prevent regurgitation. Regurgitation of sour-tasting or bitter-tasting material can result from acid coming up from the stomach. Regurgitation of tasteless fluid containing mucus or undigested food can result from a narrowing stricture or a blockage of the esophagus or from an abnormal pouch in the esophagus called a Zenker diverticulum.
Regurgitation in Patients with Gastroesophageal Reflux Disease
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Rumination syndrome is a condition in which people repeatedly and unintentionally spit up regurgitate undigested or partially digested food from the stomach, rechew it, and then either reswallow it or spit it out. Because the food hasn't yet been digested, it reportedly tastes normal and isn't acidic, as vomit is. Rumination typically happens at every meal, soon after eating.
Rumination syndrome , or merycism , is a chronic motility disorder characterized by effortless regurgitation of most meals following consumption, due to the involuntary contraction of the muscles around the abdomen. It is increasingly being diagnosed in a greater number of otherwise healthy adolescents and adults, though there is a lack of awareness of the condition by doctors, patients and the general public. Like related gastrointestinal disorders, rumination can adversely affect normal functioning and the social lives of individuals.