How does Hypnotherapy work?

Another question often asked is “does hypnotherapy work?”.  Of course it is possible to ask someone who has had hypnotherapy whether it has worked for them but is there any scientific evidence for the effectiveness of hypnotherapy?   The pdf you can view by clicking the link below has been produced by Mark Tyrell for Uncommon Knowledge and it gives an insight in to some of the research that has been carried out on the effects of hypnosis.

How does Hypnosis work?  Free download