I know that most patients with amputations have a very keen sense of the position of their absent leg or arm. By concentrating, the patients are also often able to change the position of the limb slightly. In the course of this, taking the example of an amputated leg, muscles can be seen to tense in the region of the pelvis. This is not surprising since whole muscle chains are activated when limbs are moved. That means that to move a foot, muscle chains must work which extend to the pelvis or even to the head. Therefore, a disturbance in such a muscle chain has an effect on the (no longer existing) foot.
Experience shows that such disturbances very often have their source in the region of the pelvis. So, if the disturbed tension of a chain of muscles is regulated starting from here, this automatically affects the end of the muscle chain: the foot. In this manner, at least, pain in the region of the leg can be eliminated (in non-amputees). Why not the pain in a non-existent leg?

Experience with fmt shows: the place where the pain is felt is not as a rule the site of the origin of the pain. The pain can perfectly well be sensed in the leg which is no longer present, and it can be remedied in the remaining body.