Dumping syndrome?
Dumping Syndrome: Whereby stomach contents move too rapidly through the small intestine. Symptoms include nausea, weakness, sweating, faintness, and, occasionally, diarrhea after eating, as well as the inability to eat sweets without becoming so weak and sweaty that the patient may have to lie down until the symptoms pass.
I pulled this from the glossary on the home page of this site. Hope it helps.
Here are a couple of web sites that can explain it better than I can.
http://www.mayoclinic.com/health/dumping-syndrome/DS00715
http://www.livingafterwls.com/Library/Dumping.html
Chris
