I stumbled across this treatment used for post menapausal women as well as PTSD sufferers. Its supposedly completely resets the neurological “fight or flight” system and has shown relief of PTSD type symptoms such as insomnia, anxiety and even some vision issues like sensitivity to light.
Here is one article. There are several others if you do a search.
I have reached out to a clinic that does this treatment to get more info. I’ll update this thread with any useful information.