When it comes to analgesia* or mental anesthesia, the glove technique is one of the most well-known and widely used techniques in self-hypnosis.
Using your imagination, you create layers of imaginary gloves in different materials that can numb your hand. Once you are numb, you can transfer this numbness to the area that really needs soothing.
*Analgesia is the reduction of sensitivity to pain for therapeutic purposes.