Dark patch on head?

[Firebonbon]

I noticed that this morning, when I was waking Paco up, he had a darker patch over his left eye towards the middle of his head. Here's a picture I took when he woke up this morning:


Doesn't seem to be causing him any discomfort, and it fades after he's awake and moving. So I don't know what it is. Temps are like they've always been.

 

[AHBD]

Hi there...it looks like an uneven shed, sometimes they are just in random patches and look freaky like that.

 

[Firebonbon]

Thank goodness. Haha.