Emile Coue was a French psychologist and pharmacist who invented the “Every day, in every way, I am getting better and better” after he stumbled upon a patient who was cured by taking sugar pill instead of prescribed drug. This “self-healing” is known as Placebo Effect.
When a person believes something strongly, he will create a so-called Self-fulfilling Prophecy. For example, if you believe strongly that you can do a certain thing, your mind that believes in it will give command to the body to act it all out.
The self-hypnosis suggestions are probably used as a placebo effect.
whiteglovehypnotist 