Quote Originally Posted by Kendayar View Post
When Odus was teleported out of Norrath, Erudites got hit with some serious magic.
This, which is why they have magical glyphs on their bodies, and no hair. It was like chemo therapy in RL that causes radioactive tattoos.

its also explained in the erudite lore in the begining zones of fp and qeynos. Well, it was before those quests and locations got made to go poof by the devs.