Most folks are inflexed with symptoms of hysteria every now then. The fright flight and fight mechanism may be a common instinct of the physical body and is solely an adaptive function that's performed in times of emergency. Nevertheless, for a few, after the symptoms of hysteria have struck in, it's difficult to revive back to the traditional mode of life, and thus, getting their parasympathetic nervous system function proper maybe a batch of trouble. That’s the state where the anxiety disorders set in and therefore the need for treatment becomes mandatory.