Dagon had pretty swirls on him.
Of course, since Dagon is a Daedric Prince, however he appears does not need to follow any logic mortals use, so that doesn't really mean much.
In any case, scars like the one over Jiub's eye are obviously just normal scares, as to the dots some Dunmer seem to have on their foreheads? I don't know, are they even scars? It's difficult to determine what they are due to the low quality of Morrowind's graphics, and I don't recall any similar features in other games (though in Oblivion's case, this is not saying much, since no race has any sort of unique facial feature, it's all just generic textures every character of a race uses.)