It is important when choosing a practice that you check if they are certified with a reputable board of hypnotherapists. Anyone can promote himself or herself as a hypnotherapist regardless of training or certification. So It pays to do a little research - however most practices are reputable with proper training. Ask where they were trained and who has certified them.
^ Jump up to: a b c d Grant, Anthony M.; Cavanagh, Michael J. (2011). "Coaching and Positive Psychology: Credentialing, Professional Status, and Professional Bodies". In Sheldon, Kennon M.; Kashdan, Todd B.; Steger, Michael F. Designing Positive Psychology: Taking Stock and Moving Forward. Oxford; New York: Oxford University Press. pp. 295–312. doi:10.1093/acprof:oso/9780195373585.003.0019. ISBN 9780195373585. OCLC 610144651.
Coleman Griffith worked as an American professor of educational psychology at the University of Illinois where he first performed comprehensive research and applied sport psychology. He performed causal studies on vision and attention of basketball and soccer players, and was interested in their reaction times, muscular tension and relaxation, and mental awareness.[11] Griffith began his work in 1925 studying the psychology of sport at the University of Illinois funded by the Research in Athletics Laboratory.[12] Until the laboratory's closing in 1932, he conducted research and practiced sport psychology in the field. The laboratory was used for the study of sports psychology; where different factors that influence athletic performance and the physiological and psychological requirements of sport competitions were investigated. He then transmitted his findings to coaches, and helped advance the knowledge of psychology and physiology on sports performance. Griffith also published two major works during this time: The Psychology of Coaching (1926) and The Psychology of Athletics (1928). Coleman Griffith was also the first person to describe the job of sports psychologists and talk about the main tasks that they should be capable of carrying out. He mentioned this in his work “Psychology and its relation to athletic competition”, which was published in 1925.[13] One of the tasks was to teach the younger and unskilled coaches the psychological principles that were used by the more successful and experienced coaches. The other task was to adapt psychological knowledge to sport, and the last task was to use the scientific method and the laboratory for the purpose of discovering new facts and principles that can aid other professionals in the domain.
In 1996, as a result of a three-year research project led by Lindsay B. Yeates, the Australian Hypnotherapists Association[48] (founded in 1949), the oldest hypnotism-oriented professional organization in Australia, instituted a peer-group accreditation system for full-time Australian professional hypnotherapists, the first of its kind in the world, which "accredit[ed] specific individuals on the basis of their actual demonstrated knowledge and clinical performance; instead of approving particular 'courses' or approving particular 'teaching institutions'" (Yeates, 1996, p.iv; 1999, p.xiv).[49] The system was further revised in 1999.[50]
In a previous role; Director of Global Leadership Programs at General Electric’s Healthcare (GEHC) business, Mary Ellen led the partnership with Lee Hecht Harrison to execute the Global Manager Coaching Program for 7,200 global GEHC managers over two-years demonstrating success in achieving goals and creating strong ties to business performance metrics.

If coaching fails to cure a problem in six months, it can become very expensive indeed. Take the case of Tom Davis, the coach who worked with Rob Bernstein, the executive VP of sales at an automotive parts distributor. Let’s assume Davis charged a relatively low per diem of $1,500. Over the four years of his engagement—which ultimately did not solve Bernstein’s problems—he would have picked up at least $45,000 in fees. That sum would have purchased 450 hours with a competent therapist—about ten years’ worth of weekly sessions.
And yet, every day, posters, commercials, and cigarette labels tell people not to smoke. I tell myself not to smoke. It doesn't seem to be working fast enough. Although the number of smoking adults in the U.S. dropped from 20.9 percent to 17.8 percent from 2005 to 2013, smoking is still responsible for 480,000 deaths per year in the United States, and 6 million worldwide, the Centers for Disease Control and Prevention reports. Most of them have been told: Don't.

Since hypnotherapy is an adjunct form of therapy, used along with other forms of psychological or medical treatment, there are many applications. Hypnotherapy can be used to treat anxiety, phobias, substance abuse including tobacco, sexual dysfunction, undesirable spontaneous behaviors, and bad habits. It can be used to help improve sleep, learning disorders, communication, and relationship issues. Hypnotherapy can aid in pain management and help resolve medical conditions such as digestive disorders, skin issues, and gastrointestinal side effects of pregnancy and chemotherapy. It can also be used by dentists to help patients control their fears or to treat teeth grinding and other oral conditions.