There are varying types of hypnosis such as clinical hypnosis and stage hypnosis. Clinical hypnosis refers to evidence base intervention that comes with many techniques. It has a therapeutic effect on the client who is under trance.
The benefits are that the techniques used have been validated over a multitude of studies and within clinical framework. The approach is strategic and aims to alleviate pain and suffering from an emotional and physical point of view (Lynn, S. J., & Kirsch, I. 2006).
Stage hypnosis, which is mainly for entertainment purposes, can have both a negative and a positive effect on volunteers being hypnotised. Most of the studies report that the risks involved in stage hypnosis far outweigh its potential for entertainment or therapeutic purposes (Lennis G. Echterling & David A. Emerging, 2013).