It actually has some science behind it: https://www.theguardian.com/science/blog/2010/dec/17/sleep-post-traumatic-stress-disorder-ptsd https://www.theguardian.

It actually has some science behind it: https://www.theguardian.com/science/blog/2010/dec/17/sleep-post-traumatic-stress-disorder-ptsd https://www.theguardian.com/science/blog/2010/dec/17/sleep-p... https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7170365/ https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7170365/ Basically by not getting REM sleep after a traumatic event your brain doesn't get the time to actually form and store the memories of the event.