Anxiety is characterized by extreme reactions to fearful situations. When someone follows you into a dark alley, those anxious feelings of a racing heartbeat and sweaty palms gives way to heightened senses and a rush of adrenalin that can save your life. This is the fight or flight syndrome.In the case of frequent anxiety, the fearful feelings are dread of a particular situation and not the situation itself. Getting caught in traffic can cause an anxiety attack over what might happen when you get to work late. Starting a new job can bring on anxiety attacks. You don’t know anyone and fear of that unknown can send you into a panic.