Yes, that photo helps. It looks just like where a previously damaged & scabbed scale came off with his latest shed- that's why it's red but not bleeding. It likely bled a little bit initially, but you missed it, & it's hard to see on his coloration, so don't beat yourself up too much, lol. You can expect that he might shed a little more often for a while now- that's what snakes do when they have something that needs healing- they re-shed to heal it faster.