You can check out my dream journal for specifics, but I'm going crazy trying to figure out why I keep having such gruesome and gory dreams.
I've been watching nothing of the sort on TV or movies and neither have I been reading about such or talking about such.

The common themes seem to be dismemberment and "skinning" with the possibility of wearing the other persons skin (it isn't literally "skinning" though).

They're not nightmares in the sense that they wake me up. They don't. But I'm thoroughly disturbed by them after I wake up.