It looks like this, from the front it's not too visible, but from the back...
In this picture I have let more hair grow at the top, however the hair is exactly the same size at the bottom, where it goes from light to dark
Hi, for years (or maybe since forever, I don't really know at this point), I've noticed that my hair is denser in certain places: at the front and back of my head (I became aware of this problem the day I looked at the back of my head with a mirror).
Do you know if this corresponds to a...