when I was younger I pinched my for skin pretty bad but didn’t think much at the time still 8 years later there is still a purple mark there which is slightly uncomfortable to touch but doesn’t really hurt or cause discomfort usually. The mark is sort of on top of a vein and the whole thing is slightly more purple than the other side of penis.
is it anything to worry about considering I’ve had it for years?
how can I make it go away?
Unlikely to be a major problem. we're not doctors on here, so I suggest you ask one!
It's unlikely to be anything serious, and I suspect there may not be much you can do about it, but it's hard to say without a pic.
If you want to add a pic, you need to be on a PC or laptop with a large window to add pictures. If you are, then you should see some extra icons towards the top right of where you type, and the right hand icon (which I think is supposed to look like the sun over hills) will add images.
The pic I've attached here shows the icons: