Perhaps the best place to start answering this question is by talking about what Hypnotherapy isn't. It isn't mind control, I won't be turning you into a chicken or Elvis or making you do anything you don't want to do! Hypnotherapy doesn't work like that and it is different to the hypnotist stage shows that you may have seen. Hypnotherapy works by allowing you to totally relax into a trance state.
Once you are relaxed your mind becomes open to suggestions - you are totally in control at all times and those suggestions will only be accepted by your subconscious mind if you want them to be.
It's a safe, natural and relaxing experience.
The most important thing is that you want to make a change.