Anxiety disorders are the most commonly diagnosed amongst the realm of mental disorders. Studies show that 1 in 14 people globally have an anxiety disorder. The American Psychological Association (APA) defines anxiety as "feelings of tension, worried thoughts and physical changes." Disability driven by anxiety is most common between ages 15-34 and is greater for women. There are many types of anxiety disorders, the most common being specific phobias and social anxiety disorder. Below are a list of symptoms related to different kinds of anxiety.