There have been quite a few very promising leads on PSSD that have furthered our understanding of PSSD (for details, you can check #meso-taarn-collaboration channel on my Discord server). I should make a summary of the findings later on and share them with here. Just waiting for when there are more data.
For now, I purpose a hypothesis regarding PFC dysfunction in PSSD:
https://www.theresearchzone.com/post/pfc-dysfunction-in-pssd