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A disc bulge occurs when the tough outer layer of an intervertebral disc weakens or is damaged, allowing the soft inner core to push through. This can place pressure on the nearby nerves, leading to pain, numbness, and tingling sensations in the affected area. Disc bulges most commonly occur in the lumbar (lower back) and cervical (neck) regions of the spine. Lumbar disc bulges causing referred pain down the back of the leg are also known as Sciatica.
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