Anxiety is an emotion characterized by an unpleasant inner turmoil, accompanied by nervous behavior — a feeling of uneasiness and worry. Almost everyone experienced anxiety. It is a normal reaction to stress. But when you’re experiencing intense anxiety and heightened fear along with other unpleasant physical symptoms on an extended period, it could be that you are suffering from an anxiety disorder. It is important to understand this early on because if left unchecked, could lead a person to other problems, more commonly alcohol and substance abuse and would need help with addiction among others.