My family doesn't know, though my mum sometimes says things that make me think she has an inkling.

Body language can tell a lot. There are so many subtle forms of communication that we may not even realise we are giving or receiving and yet we do react to. Unfortunately I find with PTSD I'm less able to pick up these cues.

I usually find the opposite. I've told few people what I'm going through and they tend to say things like "but you seem fine" which is both reassuring and frustrating. I hide when I'm obviously not well and don't spend time around people and, the things that really set me off don't tend to happen in casual interactions. Sometimes I feel I have to justify myself, yes it really is that bad.