Back pain: Pain felt in the low or upper back. Causes of pain in the low and upper back include conditions affecting the bony spine; discs between the vertebrae; ligaments around the spine and discs; spinal inflammation; spinal cord and nerves; muscles; internal organs of the pelvis, chest, and abdomen; tumors; and the skin.
Quick GuideLow Back Pain: Symptoms, Causes, Treatment, Relief
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Back Pain Resources
Last Editorial Review: 5/13/2016