[ConservativeMind]

He swallowed it and did not breathe it in?

[LouAvul]

stung by a bee on the mouth, which subsequently triggered anaphylactic shock

Title was erroneous. He got stung on his mouth and it triggered an allergic reaction.

I've heard of people swallowing bees, wasps, from drinking soda outside from an open can. The bee/wasp crawled into the can, person takes a drink, etc. But this wasn't that.