In the case of Sciatica Lower back pain is sometimes but not always present. Weakness or numbness may occur in various parts of the leg and foot. 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. For others, the sciatica pain might be infrequent and irritating, but has the potential to get worse. Immediate medical attention is required if there is symptoms of progressive lower extremity weakness, numbness in the upper thighs, and/or loss of bladder or bowel control.
Inflammation in the spinal canal can also spread to adjacent facet joints and cause lower back pain in the posterior thigh. Pseudosciatic pain can also be caused by compression of peripheral sections of the nerve, usually from soft tissue tension in the piriformis or related muscles. 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.
Diagnosed by physical examination, and the history of the symptoms. The most applied diagnostic test is the straight leg raise to produce Lasègue's sign, which is considered positive if pain in the distribution of the sciatic nerve is reproduced with between 30 and 70 degrees passive flexion of the straight leg. lumbar disc herniation can be diagnosed by computerised tomography or magnetic resonance imaging.