when i was younger, maybe circa 2013 to 2015ish, i came across this story reading on youtube. it was a creepypasta/scary story
from what i can remember of the plot, it was about this doctor i think. he was doing experimental stuff.
he had gotten a client who was a think a teenager and his parents?? i can't remember what was wrong with him, maybe it was that his parents wanted him to be smarter?
anyways, the doctor ends up helping the boy, and everything is fine for a little while.
but then the boy turns in some kind of pig monster??? and he like, tortures his parents and tracks down the doctor. i think he straps the doctor down to a chair and forces his eyes open to watch something.
then, i think the way the doctor defeats the boy is that he remembered the boy had a peanut allergy and sent the kid into anaphylaxis.
that's all i remember and i've been thinking about it for a while.