Hello, I'm new to the forum as well as to betta keeping. I got a male betta about two weeks ago and I noticed he had some small pink spots on his head. I thought it might be missing scales so I didn't worry about it initially, but now I think it's gotten worse. I usually research to diagnose problems but I figured it'd be easiest to just ask some people who may be able to tell me definitely what is going on.
He's in a five gallon filtered and heated tank. He has no tankmates. The temp should be around 76-78F, I don't currently know the water parameters (I need to go buy a new test kit,) but I do frequent water changes. He's been acting normally as far as I know. He eats well and he likes to pace the back wall of the tank. I haven't noticed any darting or running into things.
So from the pictures below, do you guys think he has a disease or infection or something? It looks like holes to me, so I was thinking something bacterial? Thanks.
(Sorry that the pictures are a little blurry.)