典型的退变性椎间盘疾病从椎间盘壁小的撕裂开始。椎间盘壁称为纤维环。

Degenerative disc disease typically begins when small tears appear in the disc wall, called the annulus.

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退变性椎间盘疾病导致的疼痛可源于椎间盘本身，或由脊柱生物力学的改变而产生。

Pain from degenerative disc disease can originate in the disc itself, or come from changes in the biomechanics of the spine.

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退变性椎间盘疾病，简称% DDD，作为正常老年化过程的一部分，发生于很多人。

Degenerative Disc Disease, or DDD, occurs in many people as part of the normal aging process.

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