Is it normal to laugh so hard you throw up?
Unusual.Less common, but harmless
It can happen, though it’s not especially common. If it only happens when you’re laughing extremely hard and you otherwise feel fine, it’s usually harmless.
A big laughing fit can make your stomach muscles contract and trigger your gag reflex—especially if you’ve just eaten or you’re already feeling queasy. It’s an embarrassing party trick, but not unheard of.