Hypnotherapy is a form of psychotherapy used to create unconscious change in the patient in the form of new responses, thoughts, attitudes, behaviors or feelings. It is undertaken with a subject in hypnosis. 
A person who is hypnotized displays certain unusual characteristics and propensities, compared with a non-hypnotized subject, most notably heightened suggestibility and responsiveness.
Hypnosis in childbirth
Hypnosis was originally used to treat the condition known in the Victorian era as hysteria.  Modern hypnotherapy is widely accepted for the treatment of anxiety,  subclinical depression,  certain habit disorders, to control irrational fears,   as well as in the treatment of conditions such as insomnia  and addiction.  Hypnosis has also been used to enhance recovery from non-psychological conditions such as after surgical procedures  and even with gastro-intestinal problems,  including IBS.  
Cognitive hypnotherapy and bulimia
Scientific literature suggests a wide variety of hypnotic interventions can be used to treat bulimia nervosa.  Similar studies have shown that groups suffering from bulimia nervosa, undergoing hypnotherapy, were more exceptional to no treatment, placebos, or other alternative treatments. 
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