A health care provider will diagnose<unk>  primarily on the basis of symptoms. The following tests may also help confirm<unk>  and exclude other conditions with similar symptoms: * A modified oral glucose tolerance test checks how well insulin works with tissues to absorb glucose. A health care provider often confirms<unk>  in people with: * low blood sugar between 120 and 180 minutes after drinking the solution * an increase in hematocrit of more than 3 percent at 30 minutes * a rise in pulse rate of more than 10 beats per minute after 30 minutes * A gastric emptying scintigraphy test involves eating a bland meal that contains a small amount of radioactive material. An external camera scans the abdomen to locate the radioactive material. The radiologist measures the rate of gastric emptying at 1, 2, 3, and 4 hours after the meal. The test can help confirm a diagnosis of<unk> . The health care provider may also examine the structure of the esophagus, stomach, and upper small intestine with the following tests: * An upper GI endoscopy to see the upper GI tract. A gastroenterologist carefully feeds the endoscope down the esophagus and into the stomach and duodenum. A small camera mounted on the endoscope transmits a video image to a monitor, allowing close examination of the intestinal lining. * An upper GI series examines the small intestine. During the procedure, the person will stand or sit in front of an x-ray machine and drink barium, a chalky liquid. Barium coats the small intestine, making signs of a blockage or other complications of gastric surgery show up more clearly on x rays.
Dumping syndrome
Refeeding syndrome
Reactive hypoglycemia
Diabetic hypoglycemia
Hedonic hunger
Idiopathic hypoglycemia
Idiopathic postprandial syndrome
Infection-induced anorexia