i used to have what kyou had when i was a kid, couldnt feel pain at all (though luckily at times i can, even though its random), this ended up giving me alot of scars and practically a nightmare for caring parents. I got stabbed on my forehead with a pencil, fallen off tall slides and hit my head first, stabbed/sliced my arm and chin. Luckily though ever since i got stabbed by the pencil and went to surgery at that time, miraculously i started consistently feel pain and to be honest, with how i am, i probably die young if i still cant feel pain when im at right now lol (also extra note : though it was low, if i still cant feel pain when i enter puberty, there was a likely chance i could be paralyzed top to bottom since my muscles aren't working properly)