Signs and symptoms of dumping syndrome generally occur right after eating, especially after a meal rich in table sugar (sucrose) or fruit sugar (fructose). Signs and symptoms might include:

  • Nausea
  • Vomiting
  • Abdominal cramps
  • Diarrhea
  • Flushing
  • Dizziness, lightheadedness
  • Rapid heart rate

Late dumping signs and symptoms, which occur one to three hours after eating, are due to your body releasing large amounts of insulin to absorb the large amount of sugars entering your small intestine after you eat a high-sugar meal. The result is low blood sugar.

Signs and symptoms of late dumping can include:

  • Sweating
  • Hunger
  • Fatigue
  • Dizziness, lightheadedness
  • Weakness
  • Rapid heart rate

Some people have both early and late signs and symptoms. Some people develop dumping syndrome years after surgery.

When to see a doctor

Contact your doctor if any of the following apply to you.

  • You develop signs and symptoms that might be due to dumping syndrome, even if you haven't had surgery.
  • Your symptoms are not controlled by dietary changes.
  • You are losing large amounts of weight due to dumping syndrome. Your doctor may refer you to a registered dietitian to help you create an eating plan.
June 10, 2015