Human anatomy of the<unk> <unk> es result from damage, wear, or trauma to the bones, muscles, or other tissues of the<unk> . Common<unk> es include sprains and strains, herniated discs, and fractured vertebrae. The lumbar spine is often the site of<unk>  pain. The area is susceptible because of its flexibility and the amount of body weight it regularly bears. It is estimated that low-back pain may affect as much as 80 to 90 percent of the general population in the United States.
Back injury
Back strain
Sprain
Spinal fracture
Spinal disease
Spinal stenosis
Cervical spine disorder
Lumbar disc disease