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spinal headache in Medicine

spinal headache

n.
  1. A headache that is brought on by sitting or assuming an upright posture following spinal anesthesia; it is usually relieved by lying down.
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The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.