Long-Term-Fear-And-PhobiasPhobia Phobias are one of the most common mental illnesses in the United States. The National Institute of Mental Health suggests that 8% of U.S. adults have some type of phobia. Women are more likely to experience phobias than men. Typical symptoms of phobias can include nausea, trembling, rapid heartbeat, feelings of unreality, and being preoccupied with the fear object. The American Psychiatric Association (APA) identifies three different categories of phobias: social phobias, agoraphobia, and specific phobias.1 When people talk about having a phobia of a specific object such as snakes, spiders, or needles, they are referring to a specific phobia.