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Health A-Z

Medical Content Created by the Faculty of the
Harvard Medical School

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.

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From Health A-Z, Harvard Health Publications. Copyright 2007 by the President and Fellows of Harvard College. All rights reserved. Written permission is required to reproduce, in any manner, in whole or in part, the material contained herein. To make a reprint request, contact Harvard Health Publications. Used with permission of StayWell.

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