Just to clarify re Focus Outward, and the dangers of observing self.
When somebody has a physical pain, it might also help to not focus right ON the injured area - the notion of "distract yourself" is probably good advice. The more we sit and stare at the throbbing body part, the more we are conscious of the pain.
But...that is not what I'm saying with DP.
If you have a busted foot, the foot is going to heal whether you "focus on it" or not. It is going to heal at exactly the same RATE whether you focus on it or not. You can sit there and stare at your foot 24/7, or you can do everything in your power to not think about it, and it will heal at exactly the same rate.
With DP, the self-monitoring STOPS the healing.
This is not "oh, you'll feel better if you're not focused on it" like with the foot.
Depersonalization, derealization (dissociative altered states of consciousness) THRIVE on self-observation. They blossom, flourish and pulsate under the direct light of self-monitoring.
I do not say "do everything you can to NOT focus on yourself" just to help you get through the day a little easier. Every time you indulge in lenthy self-observation, you are solidifying the DP symptoms. Casting them in cement. Grinding them into your Self.
Trust me. With careful self-observation, never waivering, you can keep this symptom with you for life.