Athis is a very crude version of sounding. Look it up. I think in this case the stylis is a poor choice for a sound. Plastic with lots of places that bacteria can live .
Is this the same as "sounds" they call them, various sized metal rods?
Bro I'm not here to judge, but nothing should be forcefully shoved down your urethra. Yeah I get it, some people have weird things they like, but bro you gotta stop shoving stuff down your penis.
I think you should see a doctor if it continues bleeding after two or three days, or notice any prolonged discomfort. You most likely just grazed or scratched your urethra, because once again nothing is meant to be going in there.
I also recommend you buy a pocket ***** or a sex toy, because you gotta stop shoving stuff down your hole. It's unnatural for your urethra to have to deal with that.
MangBrah contact that doctor immediately and stop using a stylus to masturbate. Use something smooth and preferably designed for it.