(As a student who's studying to be a psychologist andmaybesomeonewhohaslivedthroughsomecrap you can always ask me for help if you want. Also the website Psychology Today is pretty lit. I use it too often. And you're absolutely right. It's more than just nightmares.)
She noticed his left hand twitching. "You're twitching." She commented, trying to turn this around on him. "Is everything ok?"