When it comes to myself, it’s quite visible, these are some very common signs I show: I get very withdrawn and barely want any social interaction (even though it’s good for me, at least in moderation,) I don’t want to do anything in particular, I speak in a quiet and tense way, and my appearance suffer (sloppy, mismatched clothing because I just pick something random, tousled hair, sloppy facial hair, a gaunt look, and so on.)