Hypnosis, and by extension self-hypnosis, is a completely natural state of being where the body reaches a sublime level of relaxation that allows the mind to totally focus on whatever issue is brought to its attention.
You can easily compare this self-hypnosis technique to the La Maze technique used by women in labor to lessen their focus on pain in order to manage it better.
Both hypnosis and self-hypnosis can be used to boost self-confidence, overcome or lessen fears and stress, and even provide a certain level of pain relief.
Depending on the classes in which you enroll, you may also learn breathing techniques (Lamaze classes), visualization, and self-hypnosis (Hypnobirthing).
Although many people choose to undergo hypnosis with the aid of a certified hypnotherapist, it is possible to induce self-hypnosis all on your own.