Beardie not shedding well?

[jmc]

I have a 9 month old Beardie named Khan and he went into shed about 6 days ago, but it still hasn't completely come off. From his head down to his body the shed came off fine, but once his tail started to shed that's where it stopped coming off. You can see where it's started, but it's been the same for the past few days? Should I be concerned? What can I do?