What is Lumbar Radiculopathy?

Lumbar radiculopathy is irritation or compression of a lumbar nerve root in the lower back. It is often called a pinched nerve in the lower back. The lumbar nerve roots exit the spine and travel into the buttocks, hips, legs, and feet.

When a lumbar nerve root is compressed or inflamed, symptoms may travel from the lower back into the buttock, thigh, calf, ankle, or foot. This radiating leg pain is often called sciatica, although sciatica describes the symptom pattern rather than the exact diagnosis. Lumbar radiculopathy may also cause numbness, tingling, weakness, or changes in reflexes.

De Novo Brain & Spine evaluates adult patients with suspected or confirmed lumbar radiculopathy to help determine the appropriate next step. Evaluation may include neurological examination, lumbar spine imaging, EMG and nerve conduction studies when appropriate, conservative care recommendations, pain management options, or surgical treatment planning in selected cases.

Common Signs and Symptoms

Lumbar radiculopathy symptoms depend on which lumbar or sacral nerve root is affected and how severe the nerve irritation or compression is.

Common signs and symptoms may include:

• Low back pain with pain traveling into the buttock, hip, thigh, calf, or foot
• Sciatica, meaning radiating leg pain along the sciatic nerve pathway
• Sharp, burning, shooting, or electric-like leg pain
• Pain that travels below the knee
• Numbness or tingling in the leg or foot
• Pins-and-needles sensation in the lower extremity
• Weakness in the hip, leg, ankle, or foot
• Foot drop, meaning difficulty lifting the front of the foot
• Reduced reflexes in the knee or ankle
• Pain that worsens with sitting, bending, coughing, sneezing, lifting, or certain movements
• Pain that worsens with standing or walking in some spinal stenosis cases
• Difficulty walking normally because of pain, numbness, or weakness

Seek urgent medical evaluation for lumbar radiculopathy with progressive leg weakness, foot drop, numbness in the groin or saddle area, new bowel or bladder problems, fever, unexplained weight loss, history of cancer, severe pain after trauma, or rapidly worsening neurological symptoms. Seek emergency medical care or call 911 for symptoms concerning for cauda equina syndrome, including loss of bowel or bladder control, severe leg weakness, or saddle anesthesia.

What Causes This Condition?

Lumbar radiculopathy occurs when a nerve root in the lower spine becomes irritated, inflamed, or compressed. The cause may involve the spinal disc, joints, bones, ligaments, or nearby soft tissues.

Possible causes and related conditions may include:

• Lumbar herniated disc, when disc material presses on or irritates a nerve root
• Bulging disc
• Lumbar spinal stenosis, which is narrowing around the spinal canal or nerve roots
• Foraminal stenosis, which is narrowing where a nerve exits the spine
• Degenerative disc disease, involving wear or breakdown of spinal discs
• Facet joint disease or arthritis-related spine changes
• Bone spurs, also called osteophytes
• Spondylolisthesis, when one vertebra slips forward relative to another
• Spondylosis, or degenerative arthritis of the spine
• Spinal instability
• Traumatic spine injury in selected cases
• Vertebral compression fracture or other spinal fracture in selected cases
• Spinal tumor, infection, inflammatory disease, or cyst in less common cases
• Prior lumbar spine surgery or recurrent nerve compression in selected patients

These causes and risk factors do not mean every patient with back or leg pain has lumbar radiculopathy. Treatment planning depends on symptoms, neurological examination, imaging findings, response to prior care, and overall health.

How It Is Diagnosed?

Lumbar radiculopathy is diagnosed through medical history, physical examination, neurological examination, and imaging or nerve testing when appropriate. The evaluation also helps distinguish lumbar radiculopathy from sciatica caused outside the spine, peroneal neuropathy, peripheral neuropathy, hip disease, sacroiliac joint pain, or other conditions.

Common diagnostic steps may include:

• Medical history and symptom review to understand low back pain, leg pain, numbness, tingling, weakness, symptom pattern, triggers, injury history, and prior treatment
• Physical examination to evaluate posture, range of motion, tenderness, muscle spasm, walking pattern, and painful movement
• Neurological examination to assess strength, sensation, reflexes, coordination, gait, balance, and signs of nerve root involvement
• Straight leg raise testing or other nerve tension testing when disc herniation or nerve irritation is suspected
• X-rays of the lumbar spine to evaluate alignment, arthritis, disc space narrowing, spondylolisthesis, fracture, or degenerative change
• Flexion-extension X-rays in selected cases to assess abnormal motion or lumbar instability
• MRI of the lumbar spine to evaluate nerve root compression, herniated disc, foraminal stenosis, spinal stenosis, tumor, infection, fracture, or other soft-tissue findings
• CT scan of the lumbar spine when bone detail, fracture, arthritis, or surgical planning requires further evaluation
• CT myelogram in selected cases when MRI is not possible or when additional detail around the spinal canal and nerve roots is needed
• Electromyography and nerve conduction studies, also called EMG/NCS, when symptoms may overlap with peroneal neuropathy, peripheral neuropathy, plexopathy, or another nerve disorder
• Blood tests in selected cases when infection, inflammatory disease, cancer-related concern, or another medical condition is suspected

The goal of diagnosis is to identify the affected nerve root, determine the cause of nerve compression, and decide whether conservative care, injections, or surgical evaluation may be appropriate.

Treatment Options

Lumbar radiculopathy treatment depends on the cause, severity, duration, neurological examination, imaging findings, prior treatment, activity limitations, and overall health. Many patients begin with non-surgical care when there is no progressive neurological deficit, cauda equina syndrome, fracture, infection, tumor, or other urgent concern.

Treatment options may include:

• Activity modification to reduce positions, lifting, bending, or movements that worsen symptoms
• Physical therapy to improve core strength, lumbar mobility, posture, flexibility, and walking mechanics
• Home exercise and stretching when recommended by a clinician or therapist
• Heat, ice, or other comfort measures for short-term symptom relief
• Anti-inflammatory medication, acetaminophen, muscle relaxants, or nerve pain medication when medically appropriate
• Treatment of posture, ergonomic, or activity-related contributors
• Lumbar epidural steroid injection in selected cases involving nerve root inflammation or radiating leg pain
• Selective nerve root block in selected cases when diagnostic or therapeutic nerve-targeted injection is appropriate
• Microdiscectomy in selected cases involving lumbar disc herniation with persistent or progressive nerve compression symptoms
• Lumbar laminectomy or decompression in selected cases involving spinal stenosis or nerve root compression
• Foraminotomy in selected cases when narrowing of the nerve exit opening is a major source of compression
• Lumbar fusion, such as transforaminal lumbar interbody fusion, lateral interbody fusion, or anterior lumbar interbody fusion, in selected cases involving instability, deformity, spondylolisthesis, or certain recurrent spine conditions
• Treatment of fracture, tumor, infection, or other structural cause when one is identified
• Rehabilitation and follow-up care to monitor pain, strength, sensation, walking, function, and nerve recovery

Surgery is not appropriate for every patient with lumbar radiculopathy. Neurosurgical treatment may be considered when symptoms are caused by structural nerve compression, progressive weakness, foot drop, spinal stenosis, herniated disc, instability, or symptoms that do not improve with appropriate non-surgical care.