Hypnotherapy has established itself well in the German-speaking therapeutic landscape over the past few decades. Knowledge about the effects of hypnosis has expanded, experiences from clinical applications have become more nuanced, and evidence of efficacy has become more substantiated. The brain physiological and biochemical effects of hypnosis are increasingly being researched, and genetic correlations are being recognized. The book provides a compact, professionally grounded overview of the mechanisms of action, practical approaches, and areas of application, illustrated by a case study.