Dumping cyndrome is one of the most unfortunately named medical conditions that has ever been put i think so. When you're eating after gastric bipast surgery or beriatric surgery, food just moves out of your stomach too quick its not predigested enough. It can cause cramps and diarrhoea. Another variation called late dumping cindrum where if you eat a an overly sugary meal or snack or whatever, it can drop your blood sugar precipitously because so much insulin gets released. One thing you definitely have to do is eat really, really slow and chew like you've never chewed before. And you might need to take supplements.