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Dumping syndrome is a condition that can develop after surgery to remove all or part of your stomach or after surgery to bypass your stomach to help you lose weight. The condition can also develop in people who have had esophageal surgery. Also called rapid gastric emptying, dumping syndrome occurs when food, especially sugar, moves from your stomach into your small bowel too quickly.
Most people with dumping syndrome develop signs and symptoms, such as abdominal cramps and diarrhea, 10 to 30 minutes after eating. Other people have symptoms one to three hours after eating, and still others have both early and late symptoms.
Generally, you can help prevent dumping syndrome by changing your diet after surgery. Changes might include eating smaller meals and limiting high-sugar foods. In more-serious cases of dumping syndrome, you may need medications or surgery.
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:
Feeling bloated or too full after eating
Rapid heart rate
Late dumping syndrome starts one to three hours after you eat a high-sugar meal. The signs and symptoms develop that long after you eat because your body releases large amounts of insulin to absorb the sugars entering your small intestine. The result is low blood sugar.
Signs and symptoms of late dumping syndrome can include:
Rapid heart rate
Some people have both early and late signs and symptoms. And dumping syndrome can develop 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.
In dumping syndrome, food and gastric juices from your stomach move to your small intestine in an uncontrolled, abnormally fast manner. This is most often related to changes in your stomach associated with surgery.
Dumping syndrome can occur after any stomach surgery or major esophageal surgery, such as removal of the esophagus (esophagectomy).
Surgery that alters your stomach can increase your risk of dumping syndrome. These surgeries are most commonly performed to treat obesity, but are also part of treatment for stomach cancer, esophageal cancer and other conditions. These surgeries include:
Gastrectomy, in which a portion or all of your stomach is removed.
Gastric bypass surgery (Roux-en-Y operation), which is performed to treat morbid obesity. It surgically creates a stomach pouch smaller than the stomach, meaning that you're no longer able to eat as much as you once did. It connects the small intestine to this pouch in the form of a gastrojejunostomy.
Esophagectomy, in which all or part of the tube between the mouth and the stomach is removed.
Your doctor may use some of the following methods to determine if you have dumping syndrome.
Medical history and evaluation. Your doctor can often diagnose dumping syndrome by taking a medical history, particularly if you've had stomach surgery, and evaluating your signs and symptoms.
Blood sugar test. Because low blood sugar is sometimes associated with dumping syndrome, your doctor may order a test (oral glucose tolerance) to measure your blood sugar level at the peak time of your symptoms to help confirm the diagnosis.
Gastric emptying test. A radioactive material is added to food to measure how quickly food moves through your stomach.
Early dumping syndrome is likely to resolve on its own within three months. In the meantime, there's a good chance that diet changes will ease your symptoms. If not, your doctor may recommend medications or surgery.
For people with severe signs and symptoms unrelieved by dietary changes, doctors sometimes prescribe octreotide (Sandostatin). This anti-diarrheal drug, administered by injection under your skin (subcutaneously), can slow the emptying of food into the intestine. Possible side effects include nausea, vomiting and stomach upset.
Talk with your doctor about the proper way to self-administer the drug.
Doctors use a number of surgical procedures to treat people who have dumping syndrome that doesn't respond to more conservative approaches. Most of these operations are reconstructive techniques, such as reconstructing the pylorus, or they're intended to reverse gastric bypass surgery.
Some people use supplements such as pectin, guar gum, black psyllium and blond psyllium to thicken the digestive contents and slow its progress through the intestines. If you decide to try a supplement, discuss it with your doctor to learn about any potential side effects or interactions with other medications you're taking.
Lifestyle and home remedies
Here are some dietary strategies that can help maintain good nutrition and minimize your symptoms.
Eat smaller meals. Try eating five or six small meals a day rather than three larger ones.
Avoid fluids with meals. Drink liquids only between meals. Avoid liquids for a half-hour before eating and a half-hour after eating.
Change your diet. Eat more protein — meat, poultry, creamy peanut butter and fish — and complex carbohydrates — oatmeal and other whole-grain foods high in fiber. Limit high-sugar foods, such as candy, table sugar, syrup, sodas and juices.
The natural sugar in dairy products (lactose) might worsen your symptoms. Try small amounts at first, or eliminate them if you think they're causing problems. You might want to see a registered dietitian for more advice about what to eat.
Increase fiber intake. Psyllium, guar gum and pectin in food or supplements can delay the absorption of carbohydrates in the small intestine.
Check with your doctor about drinking alcohol.
Preparing for an appointment
If you have signs and symptoms of dumping syndrome, you're likely to first see your family doctor or a general practitioner. You may then be referred to a doctor who specializes in treating digestive system disorders (gastroenterologist).
Here's some information to help you get ready for your appointment.
What you can do
Be aware of pre-appointment restrictions. When you make the appointment, ask if there's anything you need to do beforehand, such as restrict your diet.
Write down your symptoms, including any that may seem unrelated to the reason for which you scheduled the appointment.
Write down key personal information, including major stresses or recent life changes.
List all medications, vitamins or supplements you take.
Take a family member or friend along to help you remember everything.
Bring your medical records about past treatment, especially stomach surgery.
Write down questions to ask your doctor.
Questions to ask your doctor
For dumping syndrome, some basic questions to ask your doctor include:
What is likely causing my symptoms?
What are other possible causes?
What tests do I need?
What is the best course of action?
Should I see a dietitian?
I have other health conditions. How can I best manage them together?
Should I see a specialist?
Are there brochures or other printed material that I can take? What websites do you recommend?
Don't hesitate to ask other questions during your appointment.
What to expect from your doctor
Your doctor is likely to ask you questions, including:
Have you had stomach surgery, and if so, what kind?
When did your symptoms begin?
Have your symptoms been continuous or occasional?
How long after eating do your symptoms begin?
Do certain foods make your symptoms worse?
How severe are your symptoms?
What, if anything, seems to improve your symptoms?
What, if anything, appears to worsen your symptoms?