Controversy surrounds the use of hypnotherapy to retrieve memories, especially those from early childhood or (supposed) past-lives. The American Medical Association and the American Psychological Association caution against recovered-memory therapy in cases of alleged childhood trauma, stating that "it is impossible, without corroborative evidence, to distinguish a true memory from a false one."[144] Past life regression, meanwhile, is often viewed with skepticism.[145][146]
Hence, the social constructionism and role-taking theory of hypnosis suggests that individuals are enacting (as opposed to merely playing) a role and that really there is no such thing as a hypnotic trance. A socially constructed relationship is built depending on how much rapport has been established between the "hypnotist" and the subject (see Hawthorne effect, Pygmalion effect, and placebo effect).
Changes in brain activity have been found in some studies of highly responsive hypnotic subjects. These changes vary depending upon the type of suggestions being given.[168][169] The state of light to medium hypnosis, where the body undergoes physical and mental relaxation, is associated with a pattern mostly of alpha waves[170] However, what these results indicate is unclear. They may indicate that suggestions genuinely produce changes in perception or experience that are not simply a result of imagination. However, in normal circumstances without hypnosis, the brain regions associated with motion detection are activated both when motion is seen and when motion is imagined, without any changes in the subjects' perception or experience.[171] This may therefore indicate that highly suggestible hypnotic subjects are simply activating to a greater extent the areas of the brain used in imagination, without real perceptual changes. It is, however, premature to claim that hypnosis and meditation are mediated by similar brain systems and neural mechanisms.[172]
Pierre Janet originally developed the idea of dissociation of consciousness from his work with hysterical patients. He believed that hypnosis was an example of dissociation, whereby areas of an individual's behavioural control separate from ordinary awareness. Hypnosis would remove some control from the conscious mind, and the individual would respond with autonomic, reflexive behaviour. Weitzenhoffer describes hypnosis via this theory as "dissociation of awareness from the majority of sensory and even strictly neural events taking place."[38]
Cally Stewart, OTD, OTR/L, CH joined the Center for Healthy Living in January 2017.  She was certified in hypnotherapy in 2009 and has practiced in a variety of health care settings including cancer care, family medicine, rehabilitation from injury or surgery, and chronic disease self-management.  Cally has a B.A. in psychology from Washington University in St. Louis, Missouri.  She received her master's and doctorate in occupational therapy at Tufts University and is a licensed occupational therapist in Massachusetts.  She also holds a certification in hypnotherapy through the International Association of Counselors and Therapists. 
In conventional hypnosis, you approach the suggestions of the hypnotist, or your own ideas, as if they were reality. If the hypnotist suggests that your tongue has swollen up to twice its size, you'll feel a sensation in your mouth and you may have trouble talking. If the hypnotist suggests that you are drinking a chocolate milkshake, you'll taste the milkshake and feel it cooling your mouth and throat. If the hypnotist suggests that you are afraid, you may feel panicky or start to sweat. But the entire time, you are aware that it's all imaginary. Essentially, you're "playing pretend" on an intense level, as kids do.
After developing a substantial following — “mesmerism” became “the height of fashion” in late 1780s Paris, writes Marchant — Mesmer became the subject of what was essentially the world’s first clinical trial. King Louis XVI pulled together a team of the world’s top scientists, including Benjamin Franklin, who tested mesmerism and found its capacity to “cure” was, essentially, a placebo effect. “Not a shred of evidence exists for any fluid,” Franklin wrote. “The practice … is the art of increasing the imagination by degrees.”
Hypnotherapy has been studied for the treatment of irritable bowel syndrome.[117][118] Hypnosis for IBS has received moderate support in the National Institute for Health and Clinical Excellence guidance published for UK health services.[119] It has been used as an aid or alternative to chemical anesthesia,[120][121][122] and it has been studied as a way to soothe skin ailments.[123]
This method of hypnotherapy is commonly beneficial to hypnotherapists in discovering the psychological root of a problem or symptom, such as social anxiety, depression, or past trauma. These types of trauma are often hidden in unconscious memory and forgotten on a conscious level. Using hypnotherapy for analysis has proven particularly effective at digging into the subconscious memory to attempt to retrieve suppressed memories or early developmental trauma that could result in a wide range of psychological conditions or problematic behavior.
SWIHA offers two Hypnotherapy programs: One is a 100-hour Certificate of Excellence and the other is a Clinical Hypnotherapy Certificate. The 100-hour certificate is designed for personal enrichment, self-empowerment, or offers skills that could be added to an existing Holistic Healthcare Practitioner’s practice. The 100-hour certificate prepares graduates for membership into the American Board of Hypnotherapists (ABH) or National Association of Transpersonal Hypnotherapy (NATH).
Before long, hypnotism started finding its way into the world of modern medicine. The use of hypnotism in the medical field was made popular by surgeons and physicians like Elliotson and James Esdaille and researchers like James Braid who helped to reveal the biological and physical benefits of hypnotism.[50] According to his writings, Braid began to hear reports concerning various Oriental meditative practices soon after the release of his first publication on hypnotism, Neurypnology (1843). He first discussed some of these oriental practices in a series of articles entitled Magic, Mesmerism, Hypnotism, etc., Historically & Physiologically Considered. He drew analogies between his own practice of hypnotism and various forms of Hindu yoga meditation and other ancient spiritual practices, especially those involving voluntary burial and apparent human hibernation. Braid's interest in these practices stems from his studies of the Dabistān-i Mazāhib, the "School of Religions", an ancient Persian text describing a wide variety of Oriental religious rituals, beliefs, and practices.
Hypnotic music became an important part in the development of a ‘physiological psychology’ that regarded the hypnotic state as an ‘automatic’ phenomenon that links to physical reflex. In their experiments with sound hypnosis, Jean-Martin Charcot used gongs and tuning forks, and Ivan Pavlov used bells. The intention behind their experiments was to prove that physiological response to sound could be automatic, bypassing the conscious mind.[155]
Accreditation ensures a basic level of quality in the education you receive from an institution. It also ensures your degrees will be recognized for the true achievements they are. It is the job of an accreditation organization to review colleges, universities, and other institutions of higher education to guarantee quality and improvement efforts.

Visualization and imagery techniques involve the induction of a relaxed state followed by the development of a visual image, such as a pleasant scene that enhances the sense of relaxation. These images may be generated by the patient or suggested by the practitioner. In the context of this relaxing setting, patients can also choose to imagine themselves coping more effectively with the stressors in their lives.

In this special mental state, people feel uninhibited and relaxed. Presumably, this is because they tune out the worries and doubts that normally keep their actions in check. You might experience the same feeling while watching a movie: As you get engrossed in the plot, worries about your job, family, etc. fade away, until all you're thinking about is what's up on the screen.
In Test 1 Mendelsohn and colleagues found that people in the PHA group (who could experience PHA) forgot more details from the movie than people in the non-PHA group (who could not experience PHA). But in Test 2, after the suggestion was cancelled, this memory loss was reversed. People in the PHA group correctly recognized just as many details from the movie as people in the non-PHA group. Somewhat surprisingly, however, the suggestion to forget was selective in its impact. Although people in the PHA group had difficulty remembering the content of the movie following the forget suggestion, they had no difficulty remembering the context in which they saw the movie.
Franz Mesmer (1734–1815) believed that there is a magnetic force or "fluid" called "animal magnetism" within the universe that influences the health of the human body. He experimented with magnets to impact this field in order to produce healing. By around 1774, he had concluded that the same effect could be created by passing the hands in front of the subject's body, later referred to as making "Mesmeric passes". The word "mesmerize", formed from the last name of Franz Mesmer, was intentionally used to separate practitioners of mesmerism from the various "fluid" and "magnetic" theories included within the label "magnetism".
There are no studies to show that hypnosis can affect outcomes after breast cancer specifically. However, hypnosis does appear to help with some of the symptoms of cancer and side effects of its treatment, such as pain, nausea, vomiting, stress, and anxiety. Research is also being done to find out whether hypnosis can help reduce hot flashes in women who have had breast cancer.

In this special mental state, people feel uninhibited and relaxed. Presumably, this is because they tune out the worries and doubts that normally keep their actions in check. You might experience the same feeling while watching a movie: As you get engrossed in the plot, worries about your job, family, etc. fade away, until all you're thinking about is what's up on the screen.
Hypnotherapy, while thought of by some as something non-scientific, is a regulated, legitimate form of therapy that can both explore and use a person’s subconscious to better help them through psychotherapy, and also act as a method of therapy that helps relieve a person of symptoms and problems they are afflicted with. Hypnotherapy has proven to be extremely effective in cases with patients suffering from pain and addiction.

Hypnotherapy is a powerful way to assist people in creating change in their lives. Hypnosis creates a highly relaxed state of inner concentration and focused attention for people, so they can make new choices based on awareness and clarity that arises as a result of a hypnotherapy session. Hypnosis has been documented to help reduce pain, sooth anxiety, create success with smoking cessation, and weight release. Self-hypnosis is an empowering skill to reduce chronic pain, improve sleep, or alleviate some symptoms of depression or anxiety.
Stage hypnosis is a form of entertainment, traditionally employed in a club or theatre before an audience. Due to stage hypnotists' showmanship, many people believe that hypnosis is a form of mind control. Stage hypnotists typically attempt to hypnotise the entire audience and then select individuals who are "under" to come up on stage and perform embarrassing acts, while the audience watches. However, the effects of stage hypnosis are probably due to a combination of psychological factors, participant selection, suggestibility, physical manipulation, stagecraft, and trickery.[152] The desire to be the centre of attention, having an excuse to violate their own fear suppressors, and the pressure to please are thought to convince subjects to "play along".[153] Books by stage hypnotists sometimes explicitly describe the use of deception in their acts; for example, Ormond McGill's New Encyclopedia of Stage Hypnosis describes an entire "fake hypnosis" act that depends upon the use of private whispers throughout.
Adverse events resulting from relaxation techniques are uncommon. Rare reports describe basilar or vertebral artery occlusion after yoga postures that put particular strain on the neck. People with poorly controlled cardiovascular disease should avoid progressive muscle relaxation because abdominal tensing can cause the Valsalva response. Patients with a history of psychosis or epilepsy have reportedly had further acute episodes after deep and prolonged meditation.
The Federal Dictionary of Occupational Titles describes the job of the hypnotherapist: "Induces hypnotic state in client to increase motivation or alter behavior patterns: Consults with client to determine nature of problem. Prepares client to enter hypnotic state by explaining how hypnosis works and what client will experience. Tests subject to determine degree of physical and emotional suggestibility. Induces hypnotic state in client, using individualized methods and techniques of hypnosis based on interpretation of test results and analysis of client's problem. May train client in self-hypnosis conditioning. GOE: 10.02.02 STRENGTH: S GED: R4 M3 L4 SVP: 7 DLU: 77"[8]