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The pain known as sciatica (sometimes misspelled as "syatica" or "psyatica") is caused by irritation of the sciatic nerve (one on each side). The symptoms of sciatica usually start in the buttock and may extend partially or all the way down the leg. The sciatic nerves are each formed by nerve roots from the lower lumbar and sacral parts of the spinal cord. The individual nerve roots come together in the lower pelvis to form the sciatic nerves. Each sciatic nerve then runs from the pelvis down the back of each leg. The sciatic nerve splits into two parts below the knee and the two halves run down the back of the lower leg to the foot.While there are several possible causes of sciatica, by far the most common source of sciatic nerve irritation is a bulging or herniated disc in the lower lumbar spine. A damaged disc may bulge into the opening where one of the nerve roots exits the spine on it's way to join other nerve roots as part of the sciatic nerve. The bulging disc may create direct nerve pressure, and/or may trigger inflammation and swelling, which can also cause pressure on the nerve. When this occurs, pain and other symptoms may be felt part along the course of the sciatic nerve, starting in the buttock area and possibly running down the leg, sometimes all the way to the foot.Besides disc bulges, spinal openings for nerves may be narrowed by bone spurs or other bone formations related to spinal degeneration. Sciatica may also be caused by direct injury to the sciatic nerve after it leaves the pelvis, such as can occur with an impact or heavy pressure applied just behind the hip joint. Rare sources of sciatica can include spinal tumors, which can compress sciatic nerve roots as they exit the spine. Another rare cause of sciatica is a cyst or tumor that compresses the sciatic nerve in the hip or knee area.Not every buttock or leg pain that people think is sciatica is acutually sciatica. True sciatica (sciatic nerve irritation) is usually felt mostly in the back of the leg (not the front or side of the leg). The symptoms of true sciatica can take different forms and may be descibed as tingling, burning, stabbing, aching, electric shock, numbness, or heaviness. But even if symptoms seem like sciatica, they are not always due to actual irritation of the sciatic nerve.One common condition that closely mimics sciatica is caused by knots of contraction called trigger points in a muscle called the piriformis. The piriformis muscles are located on either side of the lower buttock area, running from the upper thigh bone to the edge of the sacrum (the triangular pelvic bone that is at the base of the spine). In addition to causing symptoms that mimic sciatica, tightness in the piriformis muscle may also cause true sciatic irritation, because the sciatic nerve actually runs through the center of the piriformis muscle in some people, and can be compressed by excessive muscle contraction.Trigger points in other muscles in the buttocks and upper thigh can cause referred pain in the side of the leg that may be mistaken for sciatica as well. Bear in mind that both true sciatica and piriformis syndrome typically produce symptoms in the back of the leg. Symptoms in the side or front of the leg are usually due to problems other than sciatica.Treatment of sciatica is usually associated with treating a bulging disc. The first line of treatment is usually an attempt to reduce inflammation to reduce pressure on the nerve bymeans of oral medications. For more powerful anti-inflammatory effects, spinal injections with steroids like cortisone may be used. Depending on the case, other forms of treatment, including physical therapy, chiropractic, massage, acupuncture, and new methods of treatment such as spinal decompression may be used. In some situations, surgery may be recommended as a last resort.Most episodes of sciatica will resolve within a period of several weeks with or without treatment, but due to the severity of the pain typically involved, most people with sciatica will seek out treatment. Unfortunately, due to misconceptions by doctors and patients alike regarding the nature of sciatica, the necessary steps to prevent a return of sciatica are usually not taken. So, even though most people do recover from a bout of sciatica, nearly all will eventually have problems again at some point. Even sciatica sufferers initially treated successfully with surgery will often have future problems with sciatica.The good news is that with awareness of how to manage sciatica and a little bit of effort dedicated to prevention, most people can avoid ongoing long-term sciatica problems. The challenge is simply to making people aware of the necessity of a "management" versus "cure" approach to sciatica and getting them to follow-through with preventive exercises and other self-care techniques. Article Tags: Sciatic Nerve, Nerve Roots, True Sciatica, Most People