My bearded dragon is 4 years old, and I gave him a bath today. He is currently in Brumation and hasn't been eating much. When I gave him a bath I noticed these weird marks underneath his tail, I attempted to clean these but they remained like this. Is this super serious, this is my first time with something like this?
https://www.beardeddragon.org/media/12413/full
https://www.beardeddragon.org/media/12413/full