discoloured scales around bettas mouth

[cantfindone]

Hey guys! I have a male betta. I just noticed that the scales under his mouth are becoming darker and i think their a little raised. Ive attached two photos. Any ideas as to what it is?

[MSG]

I can't find a problem with him. I think he looks good, his eyes are nice and clear & he has greenish scales around his jawline. Their colors do get lighter/darker every month or so. Mine went from whitish scales, to pinkish red over 3 months.

[cantfindone]

Thanks! Im glad its normal. Appreciate the reply :)