It's related to acupuncture points, some of which don't hurt, while others do. Effective is very effective, but it is not good for the stomach, because dieting will lose hair, and even if it does, it will still rebound. I used to lose 30 pounds with acupuncture weight loss, then I lost 20 pounds on a diet, and now I have regained 30 pounds, so the method is not the most important. The important thing is to stick to it after losing weight, eat less and exercise more, and not rebound.