Hammer growing?

[cody2cannon]

So I think you guys can see that little bubble on the side of my hammer, it's been there since I bought the frag. And during the day it gets bigger and kind of sways in the current. Is it another head is this guy growing?

 

[Diesel]

Yes that could be a new head.

 

[Ant.w]

Looks like a new head,mine has the exact same thing happening