Disc protrusion is a type of disc herniation. Disc herniation is where one of the discs located between two vertebra, called vertebral discs, slips from its usually location, often in cases of progressive vertebral arthritis. This can cause severe pain in the back and sometimes, when a nerve is consequently trapped, along the nerve's pathway. This is the cause behind cervicobrachial neuralgia (pain in one part of the arm) if the pressure is on one cervical vertebra; femoral neuropathy (pain in the inside of the thigh); or sciatica if the lumbar vertebra are affected. The protrusion can be revealed by x-ray of the spinal column, or even by MRI.
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. Translated by Jeff