Technical Terms - Well Explained
Strictly speaking, ischialgia, or sciatica, is not an illness but rather a sign that the sciatic nerve has been irritated. Sciatica belongs to the group of lumbalgia, which concern problems of the lumbar spine. Sometimes, the pain appears fast and furiously, so that the afflicted person can hardly move.
Ischialgia happens when one of the roots of the sciatic nerve, which exit the spinal canal and supply the legs, has been irritated or pinched. The damaged nerve emits pain signals. These express themselves as dull, persistent aches, which seem to be located in the derrière, radiating into the leg and even the foot.