There was an excellent Horizon programme about pain yesterday. Pain is a perception, it is a learned behaviour, and as such, you can learn to be less sensitive to it. You will remember your mum telling you not to make a fuss. She knew that the more you focus on pain, the worse it feels.

Hypnosis is used to alleviate cancer pain, chronic pain, stump pain, to assist with childbirth. For surgery it allows a lower dose of analgesics drugs and can avoid the need for general anaesthetic where this would be dangerous for the patient.