Hypnosis, also referred to as hypnotherapy or hypnotic suggestion, is an altered state of consciousness. This state of consciousness is usually achieved with the help of a hypnotherapist and is different from your everyday awareness. When you're under hypnosis:
Your attention is more focused
You're more responsive to suggestions
You're more open and less critical or disbelieving
The purpose of hypnosis as a therapeutic technique is to help you gain more control over your behavior, emotions or physical well-being.