Diarrhea often occurs 30 to 60 minutes later. In addition, certain substances are released by your intestine that affect heart rate and often blood pressure, causing many of the symptoms of early dumping. This can lead to lightheadedness or even fainting.
Symptoms of late dumping happen because of a decrease in blood sugar level reactive hypoglycemia. Reactive hypoglycemia is low blood sugar caused 1 to 3 hours after a large surge of insulin. You are more likely to have dumping syndrome if you eat a meal heavy in starches or sugars. The sugars can be either fructose or table sugar sucrose. Insulin levels can increase to high levels, and then lower your blood sugar too much. Dumping syndrome occurs in up to half of people who have had a part of their stomach removed for any reason.
Most people have early dumping symptoms. Typical early dumping symptoms can include:. About 1 in 4 people have late dumping symptoms. The symptoms of late dumping syndrome can include:. Your healthcare team will likely diagnose dumping syndrome based on your symptoms and when they occur. Learn more. What does a gastroenterologist do, and when should you see one? Here's what you should know before making an appointment.
Intussusception is the most common cause of intestinal obstruction in children. It can also affect adults. Learn about this condition, symptoms, and…. Health Conditions Discover Plan Connect. Dumping Syndrome. Medically reviewed by Judith Marcin, M. Symptoms Causes Treatment Complications Outlook Overview Dumping syndrome happens when food moves too quickly from your stomach into the first part of your small intestine duodenum after you eat. There are two types of dumping syndrome.
The types are based on when your symptoms start: Early dumping syndrome. This happens minutes after you eat. About 75 percent of people with dumping syndrome have this type. Late dumping syndrome. This happens hours after you eat.
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:.
Mayo Clinic does not endorse companies or products. Advertising revenue supports our not-for-profit mission. This content does not have an English version. This content does not have an Arabic version. Overview 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. Stomach and pyloric valve Open pop-up dialog box Close.
Stomach and pyloric valve Your stomach is a muscular sac about the size of a small melon that expands when you eat or drink to hold as much as a gallon about 4 liters of food or liquid. Gastric bypass surgery Open pop-up dialog box Close. Gastric bypass surgery Before gastric bypass, food see arrows enters your stomach and passes into the small intestine. Request an Appointment at Mayo Clinic.
The component parts of the undigested food remain fairly intact and therefore large. Early dumping occurs a few minutes to 45 minutes after eating. Symptoms are not life-threatening, but can be frightening to the unsuspecting patient. Symptoms of early dumping are:. Late dumping occurs two to three hours after eating. It is caused by excess insulin produced in response to rapid entry of food and fluids into the small intestine.
The high insulin levels lower low blood glucose level and cause symptoms including:. The diagnosis of late dumping syndrome can often be confirmed through frequent blood sampling to measure blood glucose. You can prevent early and late dumping by avoiding the foods that cause dumping. In other words — sugars, starches and fried foods.
Eat at least five to six small, evenly spaced meals a day. Take meals dry i. Because carbohydrate intake is restricted, protein and fat intake should be increased to fulfill energy needs.
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