Herniated Lumbar Disc

The lumbar discs sit between the vertebrae of your lower back and help absorb load while allowing your spine to move. A herniated lumbar disc occurs when disc material extends beyond its normal boundary. When that material irritates or compresses a nearby nerve root, symptoms may travel from the lower back into the buttock, leg, or foot.

In my experience, patients with an acute lumbar disc injury often tell me one of two stories. Some remember the exact moment it happened: they bent, lifted, twisted, or strained and immediately felt pain. Others finish the activity without much trouble and develop significant pain later that day or the following morning. The timing can vary, which is why the examination matters more than simply knowing when the pain started.

When a nerve root is involved, the pattern of symptoms can provide important clues. Pain, numbness, or tingling may follow a dermatome, a specific area of skin associated with a particular spinal nerve. We also look for changes in muscle strength, sensation, and reflexes to help determine which nerve may be irritated. These findings help us distinguish a suspected disc-related nerve problem from the many other conditions that can cause lower back and leg pain.

What about X-rays and MRI? X-rays do not directly show a lumbar disc herniation, but they can help us evaluate the bony structures of the lower back and look for other findings that may affect the diagnosis or treatment plan. An MRI provides much more information about the discs and nerves, but we don’t automatically order one for every patient on the first visit. MRI may be considered sooner when significant or worsening neurological deficits or other concerning findings are present. Otherwise, it is often reserved for cases in which symptoms fail to improve with conservative care, the diagnosis remains uncertain, or the results would change the treatment or referral plan.