Sciatica, also known as lumbar radiculopathy, is a condition that causes excruciating pain for several Americans every year. A person will develop sciatica when their sciatic nerve becomes pinched or irritated. The sciatic nerve is one of the longest nerves in the body, connecting the spine to the lower limbs. When this nerve becomes pinched, there is often an immense pain in the lower back or upper leg. Sciatica will often develop as a result of conditions such as degenerative disk disease, lumbar spinal stenosis, and herniated disks.