So I own 2 beardies, one is about a year and 3 months and the other is about 5 months. But I took a look at my year old+ one, and his tail was looking something that I've never seen before. And his head has been like this for.. 4 months.. not shedding.
It looks like his tail is preshed. The adults tend to take a lot longer to shed, especially on the tail areas! I am really not sure why this is, but he should eventually shed the area off.
What is the humidity in his tank?
I have to agree with Tracie here. My 2yr old takes absolutely forever to shed, she will dull and stay that way for weeks sometimes before she actually sheds, and the tail does take the longest of all to shed.