Hypnotherapy, also known as hypnotic medicine, is the use of hypnosis in psychotherapy. The efficacy of hypnotherapy is not well supported by scientific evidence, and, due to the lack of evidence indicating any level of efficacy, it is regarded as a type of alternative medicine by reputable medical organisations such as the National Health Service.

Milton Hyland Erickson was an American psychiatrist and psychologist specializing in medical hypnosis and family therapy. He was the founding president of the American Society for Clinical Hypnosis. He is noted for his approach to the unconscious mind as creative and solution-generating. He is also noted for influencing brief therapy, strategic family therapy, family systems therapy, solution focused brief therapy, and neuro-linguistic programming.