Sciatica

OVerview The sciatic nerve is formed in the lower spine by the union of L4 to S3 nerve roots and exits the pelvis through the greater sciatic foramen (deep in the buttock). The nerve then runs along the thigh, into the leg, ending at the foot. Sciatica occurs when the nerve is inflamed, irritated, and/or mechanically compressed at its nerve root end. Symptoms Pins and needles sensation that comes and goes in the thigh or leg Icy, piercing pain in the foot A feeling of warm