Reminded me of this song when I saw the title...
Censored (no nakedness)
Uncensored
Nothing to do with self-harm, it's safe to click, not triggering or anything
Anyways, I have no idea where you are in the world or how old you are, so I don't know if you can go to hospital on your own depending on your age and depending if you have to pay for treatment. I don't have any advice to be honest, except please do seek medical treatment for the wound if it is that bad ASAP.
Also, how come it says you have 0 posts? o_o