What basically happens is your hormones get out of whack. Because of the stress in your life your body says, 'I need more hormones.' So, your hormones are trying to produce and produce and produce, and it's even more stressful and it is this wicked cycle. ↗
Sometimes your body language is enough for an actor to know that you're not happy. And you don't really need to say it out loud if you deal with actors you know very well. And I don't think you really need to be explicit. ↗