It’s 03:00. My pillow is soaked with cold sweat, my body tense and shaking after waking from the same nightmare that haunts me every night. I know I’m safe in bed – that’s a fact. My life is no longer at risk, but I can’t stop replaying the terrifying scene that replayed in my head as I slept, so I remain alert, listening for any sound in the dark.

This is one of the ways I experience post-traumatic stress disorder (PTSD).

Read more at BBC.