Hypnosis is definitely safe. How is it safe?
According to a Stanford researcher named Dr Ernest Hilgard who did some experiments on hypnosis, he found that there is a part of our mind that is designed to protect us even when we are in a state of hypnosis or hypnotic trance. This part is called the ‘hidden observer’.
It is always doing the observation. In hypnosis, even when the hypnotist says that you cannot remember a certain number, do not be afraid, this is because your ‘hidden observer’ does not forget even though you may appear to forget during the hypnosis.