HI,
A therapist can use hypnosis to help people increase feelings of confidence, self esteem and control. Often people get stuck in a feedback loop that goes something like this; "I've had a setback, I feel bad about myself, therefore, I eat more." A person is likely to be successful if they learn to be compassionate with themselves, seeing a setback as a learning opportunity rather then a personal shortcoming. Weight loss often involves setbacks and plateaus, so it's important to feel empowered and good about oneself through the process.