Sciatica describes a collection of symptoms that can arise with sciatic nerve compression. This nerve is the largest and longest in the body, running from the base of the spine and down through both legs. Sciatic nerve compression can lead to pain that begins in the lower back and moves through the buttocks, legs and feet. It is also characterized by other symptoms like burning, cramping, muscle weakness, tingling and numbness. Sciatica generally occurs on one side of the body, but it can affect both sides.
The sciatic nerve is about an inch wide and consists of multiple nerve bundles. Sciatica is produced when this nerve is being compressed or pinched. Compression is often caused by a herniated disc or a bone spur, most commonly in the area where the nerve passes out of the spinal column in the lumbar (lower back) region.
