Coulrophobia is a fear of clowns. Some experts believe that one in 10 people are afraid of clowns. Some of the symptoms associated with Coulrophobia ARE Fast breathing and heart rate. An intense feeling of terror. Pale skin. Profuse sweating (hyperhidrosis). Nausea. Trembling or shaking. Any event with a clown may trigger Coulrophobia such as Birthday parties, Halloween parties and trick-or-treating. Circuses, fairs or festivals. Fast-food restaurants that use clowns as mascots. Movies, TV shows, commercials, billboards and advertisements. Coulrophobia is no laughing matter, Most clowns aren’t hiding anything, except maybe a bunch of fake flowers or a balloon animal, but for some, it’s difficult to look at a clown and not wonder what is going on underneath their makeup.