Sciatica

What Is It?

Sciatica describes persistent pain felt along the sciatic nerve. This nerve runs from the lower back, down through the buttock and into the lower leg. It is the longest nerve in the body. Pain results when this nerve is compressed or injured. It most commonly results from inflammation, bony enlargement due to arthritis or a displaced (herniated) disk in the lower spine.

Symptoms

Sciatica causes pain that begins in the lower back and spreads through the buttock, leg, calf and, occasionally, the foot. The pain generally will feel dull, aching or burning. Sometimes, it starts gradually, worsens during the night, and is aggravated by motion. Sciatica also can cause tingling, numbness or muscle weakness in the affected leg.

Diagnosis

Your doctor will review your symptoms and your medical history. He or she will want to know if you have low back pain that spreads to the leg and if you have muscle weakness in your leg or foot. Your doctor will also ask questions that might suggest a serious condition, such as a bone fracture or infection. He or she will want to know if you've had:

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