Injury query need advice!!!

[nazanova]

So my Ball Python Rocky has shed tonight and I decided to get him out and check he's ok. I noticed there was abit of stuck shed on the tip of his tail, now when I first got him I noticed the tip looked a bit "odd" but I didn't pay any attention to it. So I helped him get the stuck shed off the tip of his tail and I believe he was also shedding suspecting old old skin that must've been constricting his tail or something because when we got it off the tip of his tail is now really raw! He was even bleeding a little bit! Now I've wiped it abit just stop it bleeding and clean it but I was wondering whether I should keep him in his current substrate (Coco Fibre) or swap to something like paper towel, Orchid Bark, Newspaper etc to avoid getting dirt into it or will he be fine as it's only a very minor injury? It doesn't seem to bother him and it's not a bad injury by any means I thought I'd ask just incase.