Causes of sciatica are varied, and unfortunately in many cases the cause of sciatic pain cannot be identified. It is believed that the general wear and tear of the body can result in sciatica pain, which can usually be relieved with some form of sciatica treatment. Sciatica is caused by injury to or compression of the sciatic nerve.

Causes of Sciatica

Sciatic nerve pain starts when the main nerve into your leg, the sciatic nerve, is irritated, pinched, or compressed in some way. This can happen for one or more of several reasons; the following are the main causes of sciatica:

• Isthmic Spondylolisthesis – A stress fracture in the fifth lumbar vertebra, known as L5 can cause disc movement and hence sciatic symptoms.
• Piriformis Syndrome – This muscle lies in the lower back and can sometimes spasm, causing sciatica symptoms.
• Degenerative Disc Disease – Discs in your spine age just as you do, and are subject to wear and tear. This is just another way of saying that your discs are aging and one of them has given way, hence pinching, irritating or putting pressure on your sciatic nerve.
• Lumbar spinal stenosis – Different roots of your sciatic nerve pass through passageways in your spine. One of these passageways may get smaller, which causes pinching, irritation or increased pressure on the nerve.
• Lumbar herniated disc – The discs in your spine are like shock absorbers, allowing your back to bend and move. The effects of ageing can weaken or damage these discs which may result in a disc bulging out or even splitting, pinching or putting pressure on the sciatic nerve. This is one of the most common causes of sciatica pain.
• Trauma – Accidents that causes sudden compression of the sciatic nerve can produce great pain, for example, breaking a bone that results in pressure on the nerve.
• Tumors – May irritate or compress the sciatic nerve and produce sciatica; however, this is rarely attributed as one of the causes.
• Pregnancy – Carrying a baby is extra strain on your spine, which can cause sciatic pain.

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