Condition guide
Lumbar Radiculopathy
Irritation of a lower-back nerve root that may produce symptoms in the leg.
Overview
Lumbar radiculopathy refers to symptoms caused by irritation or compression of a nerve root in the lower spine. Unlike generalized back pain, it produces symptoms in a specific pattern that follows the affected nerve: down the front, side, or back of the leg, sometimes into the foot.
Sciatica is the most familiar example, but radiculopathy is the broader and more precise term. It signals that a specific nerve is involved, not just that the back hurts. That specificity matters, because the nerve level identifies which structure is likely responsible and shapes every treatment decision that follows.
Symptoms
- Radiating pain following a specific path down the leg
- Numbness or tingling in a defined area of the leg or foot
- Weakness in specific movements, such as lifting the foot or straightening the knee
- Pain that worsens with sitting, bending, or coughing
- Reduced reflexes on the affected side
- Back pain that may be present but is often less prominent than the leg symptoms
Possible causes
Disc herniation is the classic cause, particularly in younger and middle-aged adults. Spinal stenosis and narrowing where the nerve exits the spine become more common with age. Bone spurs, instability, and, less commonly, fractures or other structural problems can also compress or irritate a nerve root.
How it is diagnosed
The distribution of symptoms and a neurologic examination, checking strength, sensation, and reflexes in each leg, identify the likely nerve level. Straight-leg and other provocative movements add information. Imaging is interpreted in that clinical context, and electrodiagnostic testing may be used when weakness is present or the picture is unclear.
Treatment options
Many cases improve over several weeks with guided activity, rehabilitation, and medication review. When symptoms persist or significantly limit function, image-guided options such as an epidural steroid injection or a selective nerve root block may reduce inflammation around the affected nerve. Surgery is considered for progressive neurologic problems or persistent symptoms after appropriate conservative care.
When to see a specialist
Progressive weakness in the leg or foot needs prompt assessment. New bowel or bladder changes, or numbness in the groin and inner thighs, require emergency care. Otherwise, evaluation is appropriate when leg symptoms last beyond a few weeks, keep recurring, or affect walking, sleep, or work.
Common questions
Frequently asked questions
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This information is educational and does not replace an individual medical evaluation. If you have a medical emergency, call 911.