I've got a question for the more experienced handlers here. Bear with my paranoia if that's what it is, I'm quite new to this. I'll be as detailed as possible. My BP(juvenile, about 3 months old) has what looks like 3 or 4 missing scales on the top of his head, towards the back. I can't say for sure if that's what it is, though, because I'm new and they could just be faded. I know they're not parasites, since he was captive bred and I keep the tank clean. They developed(or rather, I just noticed them then) soon after he finished his last shed. While shedding(after all the symptoms prior he did a bit of head rubbing even after he finished peeling that part off, is that normal?

I can't really take pics since I lack photography equipment of any kind, and I don't have a PC cord for my phone. I'll do my best here to describe what they look like, though. His head has a black sleek black coat, and these spots of interest are slightly lighter - maybe a dark blackish gray. They're the same size as the scales.

Now, what I want to know is, is this normal if they're hard on themselves during the shed, or is this often caused by something else? And, will they grow back through consecutive sheds?

Thanks a bunch, I want to try home fixes before I consult a vet if possible.