I don't see any blisters or lesions in the picture, just missing scales, so that is good.
I would take a good look around the viv to see if there is anything causing it. Are there damp spots? How's the humidity and temperatures? Is there any mold or perhaps some unnoticed feces was accidentally missed? Is there something your snake is scraping on? I'd probably do a thorough viv cleaning just as a precaution.
If in doubt for any reason, consult with a vet who is experienced with snakes.