I think the idea is that your body is sending you a signal that you have too much on your plate and to relax a little. Unfortunately for us the human body didn't do most of it's evolving under modern conditions so that signal might not be a lot of help when you've got a boss and landlord etc breathing down your neck all the time.
it also only gets better, once you get older...
Stressed?
How about:
Also for those who suffer from depression:
I’d go on, but then I’ll start ugly crying in the office, and nobody wants that.
too late
Me at twenty
Have you thought about having kids?
It's great, because half the time I'm stressed by stuff that would be aided by me being calm and able to concentrate and interact.