Sciatica is a common type of pain affecting the sciatic nerve, a large nerve extending from the lower back down the back of each leg. Pain typically occurs in the distribution of a dermatome and goes below the knee to the foot. It may be associated with neurological dysfunction, such as weakness. Causes: Spinal disc herniation, Piriformis syndrome, Lumbar spinal stenosis, Degenerative disc disease, Spondylolisthesis and Pregnancy.
Pain in the rear or leg, Burning or tingling down the leg, Weakness, numbness, or difficulty moving the leg or foot, constant pain on one side of the rear, Sciatica affects only one side of the lower body. Often, the pain extends from the lower back all the way through the back of the thigh and down through the leg. Depending on where the sciatic nerve is affected, the pain may also extend to the foot or toes. For some people, the pain from sciatica can be severe and debilitating.
Sciatica is generally caused by the compression of lumbar nerves or by compression of the sciatic nerve. When sciatica is caused by compression of a dorsal radix, it is considered a lumbar radiculopathy. When there is a tear in the anulus fibrosus, the nucleus pulposus may extrude through the tear and press against spinal nerves within the spinal cord, cauda equina, or exiting nerve roots, causing inflammation, numbness, or excruciating pain. Inflammation in the spinal canal can also spread to adjacent facet joints and cause lower back pain in the posterior thigh.