Preventing Sciatica While Sitting
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Sciatica
Sciatica is pain going down the leg from the lower back, weakness or numbness of the affected leg.
Usual onset
50s–70s]
Duration
90% of the time less than 6 weeks
Causes
Spinal disc herniation, spondylolisthesis, spinal stenosis, piriformis syndrome, pelvic tumour
Diagnostic method
Straight-leg-raising test
Differential diagnosis
Shingles
Sciatica is a medical condition characterized by pain going down the leg from the lower back. This pain may go down the back, outside, or front of the leg.Onset is often sudden following activities like heavy lifting, though gradual onset may also occur.Typically, symptoms are only on one side of the body. Certain causes, however, may result in pain on both sides.Lower back pain is sometimes but not always present.Weakness or numbness may occur in various parts of the affected leg and foot.
About 90% of the time sciatica is due to a spinal disc herniation pressing on one of the lumbar or sacral nerve roots. Other problems that may result in sciatica include spondylolisthesis, spinal stenosis, piriformis syndrome, pelvic tumours, and compression by a baby's head during pregnancy. The straight-leg-raising test is often helpful in diagnosis. The test is positive if, when the leg is raised while a person is lying on their back, pain shoots below the knee. In most cases medical imaging is not needed.
Sciatic neuritis, sciatic neuralgia, lumbar radiculopathy
Anterior view showing the sciatic nerve going down the left or right leg
Orthopedics, neurology