Phobias come in many different forms. Acrophobia is the fear of heights. Aviophobia is the fear of flying. Felinophobia is the fear of cats. Myxophobia is the fear of slime. Some are well-recognized; others are unheard of. Follow the links below to find WebMD's comprehensive coverage about phobias, how to know if you have one, what you can do to overcome it, and much more.