back pain definitions and explanation
It is usually characterized by dull, continuous pain and tenderness in the muscles or their attachments in the lower lumbar, lumbosacral, or sacroiliac regions. Back pain is often referred to the leg or legs, following the distribution of the sciatic nerve.he natural concave line of the backbone is exaggerated. back muscle necrosis. is characterized by pain and swelling over the backs of pigs. The pigs are reluctant to move and there is arching or lateral flexion of the spine.
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.auses 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.