28 years ago I has an emotional trauma that resulted in permanent dp and eventually depression and anxiety. However, I think I also have vestibular issues which either took over from that trauma and cause my dp or just contribute to it, unless that trauma itself caused an inner ear problem.
When it first happened I was 12 and not knowing what panic attack and dp was it was so severe that I felt dysesthesia-like pain (electrical feeling) lasting for a long time. I still often experience it. I should have seen a good ENT/Neurologist long time ago. I did see a couple of quacks who put it all to my anxiety.
That feeling 9dysethesia) and dp would worsen from cigarette smoking, moving my eyes too far to the sides and especially gets extreme if I smoke weed or let's say if I stimulated inside of my right ear with my finger I would be debiliated and unable to function (would have to lie down all the time) for days due to 100% dp and extreme dysethesia feeling.
Lately I even avoid coffee. I found that amphetamines help a bit.