BP got hurt when feeding should I take him to the vet?

[Stewart_Reptiles]

That doesn't look like a scratch (& snake scales are pretty tough), it looks more like a bite to me, but cannot tell how deep (or serious) from online photos.

Clean it up with a bit of water, dry then apply some antiseptic ointment that is safe for snakes: Betadine (povidone-iodine), a bit of Neosporin (never the pain relief
version), Vetericyn (better option, water based topical made for snake use- Petco carries it). If it's bleeding alot or seems to get infected, by all means see the vet.
But for a small wound without complication, I'd treat at home for right now, as I've described above.

This plus use paper towel as substrate for a while to avoid any debris in the wound.

Your main thing to watch out for in the next few months because it may not happen now it abscess which at that point if one develops in a month or two would require to be seen by a vet (would need to be drained and antibiotic would need to be administered as well)