Phobia (from Greek fobos, "fear"), an irrational fear for something that normally does not motivate such a reaction. Phobias tends to be about such subjects that was dangerous to humans in our early development such as heights, snakes and spiders, though there are many phobia that do not fit into that picture.

Treating phobias and fears is one of hypnosis main areas. For this self hypnosis is proven to be very effective.