Hypnosis goes back to ancient Egypt with their "sleep temples", and has in some form been part of many cultures, such as in Greece and Rome. In the 18th century, Franz Anton Mesmer would induce people into a trance-like state which often produced "miracle" cures. When James Braid re-examined Mesmerism in the 19th century, he discovered that simple suggestions were just as effective and he used the phrase "hypnosis" and gradually it gained scientific respectability.

In the early part of the 20th century, hypnosis was used by stage hypnotists and even today, many people associate the therapy with stage/tv performers, thinking they will "act like a chicken" etc, when under hypnosis. This is not the case and, as previously stated, people cannot be hypnotised against their will and can reject any of the suggestions given if they feel they are not appropriate.

The British Medical Association in 1955, endorsed the practice of hypnosis and today it has become acceptable as an addition to conventional medical treatment.