I had the gastric sleeve in 2012 and had the WORST case of dumping syndrome after eating one bite of pumpkin pie at Thanksgiving (at 9 months post-op.) I ended up in the ER thinking I was having a heart attack! It seems after that I would have minor symptoms of dumping after eating even the smallest amount of sugar...even an apple (sweating, feeling hot, stomach pain, difficulty breathing.) I wasn't expecting to get dumping syndrome because I didn't have the gastric bypass!!! Once I figured out it was sugar-related, I learned my lesson and stopped eating high-sugar foods and drinks (and stopped having the dumping.)