What Is a Phantom Limb?

Phantom limb pain means that the patient can feel that the limb that is no longer present (such as surgical removal) still has obvious pain. The phenomenon of "phantom limb pain" can be shown experimentally: when the index finger is immersed in ice water, the pain will spread to other fingers that are not in the ice water, even if these fingers are anesthetized before the experiment. ^[1]