All hypnotism is self-hypnotism and can be executed alone by the subject or hypnotee.
Everyone can benefit from the hypnotic condition. No tests are ever needed. Stress is better-controlled long term by teaching the subject how to use relaxation exercises before, during and after stressful situations. However, prescribed drugs can be use in conjunction with the exercises. Working with the root cause connected to the symptom of overeating will assist the subject in long-term weight control.