I don't know what it is for me. I've yet to bring it up to either of the people I see. I do experience minor hallucinations/psychosis from time to time, but I'm not sure it's related to that. It's kind of like, looking in the mirror and seeing a perfect stranger for me. As though it's a completely different person staring back. Sometimes, I even feel like I'm not myself and like I'm watching this person who isn't myself living a life that isn't mine. Then, occasionally, I'll be sitting with a group of people I care deeply for... and feel completely detached from them. Occasionally, I don't even recognize them. It's like I don't know them. These episodes can last anywhere from one hour to a week or so. It's a terrifying experience. Such experiences can be related to a few disorders or things.. so it's always best to talk to someone when in doubt.