Hypnosis is a procedure during which a psychologist suggests that a client experience changes in sensations, perceptions, thoughts, or behavior. Hypnosis is typically entered by an induction process which may include suggestions for relaxation, clamness, and well-being. People respond to hypnosis in different ways. Some describe hypnosis as a normal state of focused attention in which they feel very calm and relaxed. Regardless of how and to what degree they respond, most people describe the experience as very pleasant. Some people are very responsive to hypnosis and others are less responsive. Contrary to some depictions of hypnosis in books, movies or television, people who have been hypnotized do not lose control over their behavior. Hypnosis is not a type of therapy. It is a procedure that can be used to facilitate therapy. Hypnosis can be used in the treatment of pain, depression, anxiety, stress, habit disorders, and a variety of other psychological and medical problems. However, it may not be useful for all psychological problems or for all clients.