Does anyone here know what causes nightmares? I haven't had any trauma in my life, do not have ptsd, but I keep having graphic and bloody dreams about people coming after me and killing me. Is there anything I can do to stop this, should I tell my doctor? I thought it may be from a medication I'm taking and posted about it in the Psychiatric Medications forum, but people don't seem to have that experience with it. Could it just be anxiety? I just started college on Monday but it's been going on longer than that.