Everybody dissociates to one degree or another...even normal people do, it's not an uncommon thing.

In the dissociative spectrum, illnesses go from PTSD, C-PTSD, DR/DP, to DID which are attributed to periods of trauma.

Drugs can cause dissociation all the way to not getting enough sleep.

If you feel like you are having a problem with dissociation, consult your mental health provider.