The primary cause for sciatica is the pressure exerted on the sciatic nerve, or damage caused to the sciatic nerve. Disc herniation in the lumbar region applies pressure on the sciatic nerve and this leads to sciatica. Either due to disc herniation or injury, if the sciatic nerve is pinched, it gets aggravated and this eventually results in inflammation of this nerve. Additional causes of sciatica are:

• Incorrect posture
• Standing or sitting for lengthy periods of time
• Not enough muscular movement
• A tumor around the sciatic nerve
• An adjoining bone irritating the nerve
• Pressure applied on the sciatic nerve in pregnancy
• Piriformis syndrome
• Lumbar spinal stenosis
• Being Overweight
• A slipped vertebra