Self-improvement is a familiar reason for people to seek a hypnotist. Some people want to improve certain skills or functions. Some want to become better writers or better public speakers. Some want to over come problems such as writers block or even stuttering. The out come of the hypnotic therapy always depends on the determination of the person who wants to make that change.
Hypnotists only guide the power that people already have.
It is the experience of people who tried hypnosis that even if they acquire the desired improvement after a hypnotic session, sustaining that improvement is their responsibility. It does not matter what kind of improvement, but what does matter is the work that comes after gaining it. A mental or emotional gain needs to be nurtured and attended to. Hypnosis is not a magical solution. It is gradually making a comeback in varies medical fields.