After eating a trigger food, inflammation spreads through your entire digestive tract over 12-24 hours, causing swelling, excess mucus, and inflammatory molecules. The internal swelling feels like severe angioedema, making you wish you'd just vomited instead of feeling this horrible inside.
Sort of, you don't notice it the first few hours after you ingest the food, but your entire digestive tract, all the way from, you know, your stomach and your esophagus, are swelling, becoming inflamed. You're getting more mucus production, more inflammatory molecules, etc. And this usually comes with a couple of things. Somewhere between 12 and 24 hours, the person will say, I wish I would have thrown up because now I just feel horrible inside. It's because their whole digestive tract is inflamed that it's sort of like, imagine having a hive reaction or angioedema with your lips or whatever on the outside of your body, but you're having it on the inside of your body.
