Anxiety is a normal part of human life. People usually experience anxiety before addressing a group or facing interview, for example. In a nutshell, anxiety increases breathing rate and heart rate, concentrating the blood flow to brain. This very physical response prepares us to face an intense situation. If it gets too intense, one might start to feel lightheaded and nauseous. An excessive or persistent state of anxiety can have a devastating effect on your physical and mental health.
According to the National Institute of Mental Health (NIMH), about 40 million American adults have some type of anxiety disorder every year. An anxiety disorder is a condition in which one experience frequent, powerful bouts of anxiety that interfere with his life. This type of anxiety can get in the way of family, career, and social obligations