Do these scales seem rot? I was at the vet just last week for a check-up and she did not mention anything about those scales. I did some research, and now I am starting to freak out, but cannot find any pictures of scale rot, especially in Uromastyxs.
I don't know about Uros specifically but if that were a dragon I would think it's just a blemish like a freckle. The scales don't look damaged the way they would with an infection.