Hypnotherapy is a use of hypnosis in psychotherapy.[84][85][86] It is used by licensed physicians, psychologists, and others. Physicians and psychologists may use hypnosis to treat depression, anxiety, eating disorders, sleep disorders, compulsive gambling, and posttraumatic stress,[87][88][89] while certified hypnotherapists who are not physicians or psychologists often treat smoking and weight management.

Several professional organizations and licensing agencies exist for hypnotherapy practitioners. Examples include the American Society of Clinical Hypnosis (ASCH) and the American Association of Professional Hypnotherapists. To be an ASCH member, practitioners must attend at least 40 hours of workshop training, 20 hours of individual training, and have completed at least two years of clinical practice as a hypnotherapist.
Hypnotherapy can have negative outcomes. When used as entertainment, people have been hypnotized to say or do things that would normally embarrass them. There have been instances where people already dangerously close to psychological breakdown have been pushed into an emotional crisis during what was supposed to be a harmless demonstration of hypnosis. A statement from the World Hypnosis Organization (WHO) warns against performing hypnosis on patients suffering from psychosis, organic psychiatric conditions, or antisocial personality disorders. Because there are no standard licensing requirements, in the wrong hands, there is a risk that the hypnotist will have difficulty in controlling or ending a hypnotic state that has been induced in the patient.
However, Freud gradually abandoned hypnotism in favour of psychoanalysis, emphasizing free association and interpretation of the unconscious. Struggling with the great expense of time that psychoanalysis required, Freud later suggested that it might be combined with hypnotic suggestion to hasten the outcome of treatment, but that this would probably weaken the outcome: "It is very probable, too, that the application of our therapy to numbers will compel us to alloy the pure gold of analysis plentifully with the copper of direct [hypnotic] suggestion."[62]
“I have been in the classroom for 22 years, both as a student and as a teacher. The Hypnotherapy Academy is the very best possible learning environment ever! The knowledge and expertise of the instructors are equally matched with their enthusiasm, clarity and humor. I found no other program that provides such comprehensive and thorough hypnosis training. The personal growth I experienced in THIS NURTURING ENVIRONMENT WAS PROFOUND!”
Not every person is hypnotizable to the same degree; some aren’t hypnotizable at all. “Hypnotizability … is modestly correlated with absorption, a personality construct reflecting a disposition to enter states of narrowed or expanded attention and a blurring of boundaries between oneself and the object of perception,” writes John F. Kihlstrom, a psychologist at the University of California, Berkeley, in a 2013 paper in Cortex. “Absorption, in turn, is related to ‘openness to experience,’ one of the ‘Big Five” dimensions of personality.”
As a hypnotherapist, I've seen first-hand the incredible changes that this form of therapy can bring. I once had a client with an intense phobia of maggots who couldn't so much as utter the word without experiencing a strong physical and emotional response. But after just two sessions she found that she was able to talk about them comfortably and was also willing to watch videos of them online without feeling disturbed. She was hardly able to believe her progress.
Jump up ^ Michel Weber is working on a Whiteheadian interpretation of hypnotic phenomena: see his « Hypnosis: Panpsychism in Action », in Michel Weber and William Desmond, Jr. (eds.), Handbook of Whiteheadian Process Thought, Frankfurt / Lancaster, ontos verlag, Process Thought X1 & X2, 2008, I, pp. 15-38, 395-414 ; cf. « Syntonie ou agencement ethnopsychiatrique ? », Michel Weber et Vincent Berne (sous la direction de), Chromatikon IX. Annales de la philosophie en procès — Yearbook of Philosophy in Process, Les Editions Chromatika, 2013, pp. 55-68.
Hypnosis is not a unitary state and therefore should show different patterns of EEG activity depending upon the task being experienced. In our evaluation of the literature, enhanced theta is observed during hypnosis when there is task performance or concentrative hypnosis, but not when the highly hypnotizable individuals are passively relaxed, somewhat sleepy and/or more diffuse in their attention.[174]
It is used for a wide variety of applications, and studies into its efficacy are often of poor quality[2] which makes it difficult to determine efficacy. Several recent meta-analyses and systematic reviews of the literature on various conditions have concluded that the efficacy of hypnotherapy is "not verified",[3] that there is no evidence[4][5] or insufficient evidence[6][7] for efficacy.