Depersonalization and Self Infliction:
I've added some Self Infliction links here 
along with DP/DR links, as sometimes a person
with DP/DR has the SI components that is first
more "tangible" upon discovery.
Excellent personal description with extensive information
Diagnoses associated with Self Infliction/Depersonalization... 
scroll down to read it all. 
Tomography study of DP. Interesting! 
Self injury