The foundation of a healthy spine lies in its intervertebral discs, which act as shock absorbers between each vertebra. These discs are composed of approximately 80% water in early adulthood, providing the flexibility and cushioning your spine needs for daily movement. However, beginning around age 30, discs gradually lose hydration at a rate of roughly 1-2% per decade, weakening the annulus fibrosus and making herniations more likely.
As the outer disc wall weakens from this progressive dehydration, repetitive micro-stresses from bending, twisting, and lifting can create small tears in the annulus. Over time, these tears accumulate until the inner nucleus material finds a pathway to bulge or rupture outward, pressing against the delicate nerve roots that branch off from the spinal cord.
Your spine's biomechanical balance depends on the coordinated function of discs, ligaments, muscles, and facet joints. When one disc herniates, the surrounding structures compensate by shifting loads unevenly, which can trigger muscle spasms, inflammation, and further joint dysfunction throughout the affected spinal region.
