The company offers a portfolio of mobile-based psychological fitness tools that help people develop mental and emotional strength and resilience to stress.

FORBES: Getting America To Check In With Itself

But experts say mental-health counselors should ask patients about their medical histories as well as emotional issues, and make sure they've had a recent physical exam.

WSJ: Confusing Medical Ailments With Mental Illness

The third group of symptoms relates to what has been called hyperarousal, which means an emotional, mental and physical tendency to drive one's flight-or-flight nervous system too hard, a classic sign of which is a tendency to startle too easily.

CNN: Can schoolyard bullying lead to PTSD?