Dumping Syndrome
Dumping syndrome happens when food moves too quickly from the stomach into the small intestine, most often after weight-loss surgery.
Plain English
Patient-Friendly Explanation
Dumping syndrome happens when food moves too quickly from the stomach into the small intestine, most often after weight-loss surgery. It can cause nausea, cramping, diarrhoea, and dizziness shortly after eating, especially after sugary meals. Symptoms usually improve when you eat smaller meals and avoid high-sugar foods.
Medical
Clinical Definition
Dumping syndrome is a constellation of gastrointestinal and vasomotor symptoms triggered by rapid gastric emptying of hyperosmolar chyme into the small intestine. Early dumping occurs within 15-30 minutes of a meal with nausea, vomiting, abdominal cramping, and palpitations, while late dumping at 1-3 hours reflects reactive hypoglycaemia from an exaggerated insulin response. It is most common after gastric bypass and sleeve gastrectomy, and management includes low-glycaemic, low-osmolar meals, separating liquids from solids, and in refractory cases octreotide or revisional surgery.
Key Insight
Why It Matters
Patients considering or recovering from bariatric surgery with Dr Joseph Wang should understand dumping syndrome, because recognising and managing it early is key to a comfortable and successful outcome after procedures such as gastric bypass.
Sources
Reviewed against standard medical references.
Medically reviewed by
Family Physician & Registered Acupuncturist, Accord Medical Clinic. MBBS (NUS), Graduate Diploma in Family Medicine (NUS), Graduate Diploma in Acupuncture (Singapore College of TCM).
Last reviewed: August 2026
This page is general health education, not medical advice. Whether any treatment is appropriate for you is a decision made in consultation after assessment.