7 ways your body betrays you when you're nervous
The problem with trying to conceal anxiety - in any situation - is that we've evolved to do exactly the opposite.
According to Joe Navarro , a former FBI agent and the author of " What Every BODY is saying , " we're hardwired to display anxiety and to recognize it in others as well. Back in our caveman days, this was a means of quickly recognizing danger.
Here are some of the most common universal, nonverbal expressions of nervousness that are pretty hard to control.