Hypnosis is a state of focused concentration during which you become less aware of your surroundings. Hypnotherapy is the use of hypnosis to treat physical or psychological conditions. It is thought that during a hypnotic state, or trance, people are better able to accept suggestions that can help change their behavior.

Studies show that techniques such as relaxation, hypnosis, and guided imagery can improve quality of life, and also can ease the nausea and vomiting caused by chemotherapy.

Many people prefer self-hypnosis, because they are alone throughout the exercise and are in control of all suggestions made during the hypnotic trance. A qualified therapist can teach you how to hypnotize yourself. Some people are able to learn from books.

Self-hypnosis usually consists of writing a script to bring on a hypnotic trance, including suggestions to help with specific problems. Usually you record the script and then play the tape whenever you want to go into a hypnotic state.

Self-hypnosis is considered safe, even when done by inexperienced people. But it should not be performed while you are driving a vehicle or in any situation where you need to be alert or be able to respond quickly.