Hypnotherapy is a form of psychotherapy used to create subconscious change in a patient in the form of new responses, thoughts, attitudes, behaviors or feelings. Hypnotherapy uses guided relaxation, intense concentration, and focused attention to achieve a heightened state of awareness that is sometimes called a trance. The person’s attention is so focused while in this state that anything going on around the person is temporarily blocked out or ignored. In this naturally occurring state, a person may focus his or her attention — with the help of a trained therapist — on specific thoughts or tasks.

The hypnotic state allows a person to be more open to discussion and suggestion, as it taps into the power of the subconscious. It can improve the success of other treatments for many conditions, including:

Cognitive behavioral hypnotherapy (CBH) is an integrated psychological therapy employing clinical hypnosis and cognitive behavioral therapy (CBT). The use of CBT in conjunction with hypnotherapy may result in greater treatment effectiveness.

https://www.psychologytoday.com/blog/think-well/201301/the-truth-about-hypnosis