Small dent on my forehead? (photo)

Only a few years back I started to notice this small dent that appears on my forehead. Which is likely caused by an injury during childhood. It looks as if that part of my forehead is a few layers underneath. I can't get a good picture of it since it's extremely hard to get a good angle. It looks like this, but less prominent. It's not a big deal actually, the reason I want it dealt with is because that it's making wrinkles form vertically, forming a big 'plus' sign on my head.