Gastric dumping syndrome

Gastric dumping syndrome, or rapid gastric emptying is a condition where ingested foods bypass the stomach very rapidly and enter the small intestine largely undigested. It happens when the small intestine expands too quickly due to the presence of hyperosmolar (having increased osmolarity) contents from the stomach. This causes symptoms due to the fluid shift into the gut lumen with plasma volume contraction and acute intestinal distention. "Early" dumping begins concurrently within 15 to 30 minutes from ingestion of a meal. Symptoms of early dumping include nausea, vomiting, bloating, cramping, diarrhea, dizziness, and fatigue. "Late" dumping happens one to three hours after eating. Symptoms of late dumping include weakness, sweating, and dizziness. Many people have both types. The syndrome is most often associated with gastric bypass (Roux-en-Y) surgery.