Lumbar Radiculopathy; Symptoms, Causes & Treatment

Lumbar radiculopathy is a condition that happens when a nerve root in the lower back becomes irritated, inflamed, or compressed. It is not contagious and cannot be passed from one person to another.

This condition can cause lower back pain that spreads into the buttock, hip, leg, or foot. Other common symptoms include numbness, tingling, weakness, and pain that may get worse with sitting, coughing, or certain movements.

Treatment usually starts with conservative measures, such as staying active as tolerated, physical therapy, and pain-relieving medication. A doctor may recommend imaging tests, injections, or surgery if symptoms are severe, persistent, or linked to warning signs such as loss of bladder or bowel control.

Main symptoms

The main symptoms of lumbar radiculopathy usually happen along the path of the affected nerve in the lower back and leg.

• Lower back pain

• Pain that travels to the buttock, hip, thigh, calf, or foot

• Shooting, burning, or electric-like pain in one leg

• Numbness or tingling in the leg or foot

• Muscle weakness in the leg or foot

• Pain that worsens with sitting, coughing, sneezing, or certain movements

• Reduced reflexes in the affected leg

• Difficulty walking, standing, or lifting the foot in some cases

Symptoms can vary depending on which nerve root is affected. Some people mainly have leg pain, while others may have both back pain and leg symptoms.

Common causes

Lumbar radiculopathy is usually caused by pressure or inflammation around a lumbar or sacral nerve root, which may be a result of:

1. Lumbar disc herniation

A lumbar disc herniation happens when part of a spinal disc moves out of place and presses on a nearby nerve root. This is one of the most common structural causes of lumbar radiculopathy.

The pain often travels down one leg in a pattern linked to the affected nerve. Symptoms may worsen with sitting, bending, coughing, or sneezing because these movements can increase pressure around the disc and nerve.

2. Spinal stenosis

Spinal stenosis happens when the spaces inside the spine become narrower. This narrowing can press on nerve roots in the lower back and cause pain, numbness, tingling, or weakness in the legs.

It is more common with age-related changes in the spine. Symptoms may become worse with standing or walking and may improve with sitting or leaning forward.

3. Degenerative spine changes

Over time, the discs, joints, and ligaments in the spine can change due to wear and tear. These changes may reduce space around the nerves or cause inflammation near a nerve root.

Degenerative changes do not always cause symptoms. However, when they irritate or compress a nerve root, they can lead to lumbar radiculopathy symptoms such as leg pain, tingling, numbness, or weakness.

4. Tumors or infections

Tumors and infections are less common causes of lumbar radiculopathy. They may affect the spine or nearby tissues and place pressure on a nerve root.

These causes are more concerning when symptoms are linked to fever, unexplained weight loss, a history of cancer, or pain that does not improve with rest. Medical evaluation is important when these warning signs are present.

Confirming a diagnosis

Diagnosis is usually based on symptoms, a physical exam, and a neurological exam. A doctor may check the location of pain, muscle strength, reflexes, and areas of numbness or tingling to identify which nerve root may be affected.

The straight leg raise test and crossed straight leg raise test may help support the diagnosis, especially when leg pain is triggered in a pattern that matches nerve root irritation. Doctors also look for symptoms that follow a dermatomal pattern, which means the pain or numbness follows the usual pathway of a specific nerve.

Imaging tests, especially MRI, may be recommended when symptoms are severe, do not improve, or when injections or surgery are being considered. Imaging may also be needed sooner if there are red flags, such as loss of bladder or bowel control, progressive weakness, fever, suspected infection, suspected tumor, or symptoms of cauda equina syndrome.

Treatment options

Treatment for lumbar radiculopathy depends on symptom severity, the cause, and whether there are warning signs. Many cases improve with conservative treatment, but some people may need injections or surgery.

1. Activity and self-care

Initial treatment often includes staying active as tolerated and avoiding movements that worsen pain. Long periods of bed rest are generally not preferred, because gentle movement can help maintain strength and mobility.

Activities may need to be modified for a short time. Heavy lifting, repeated bending, or positions that worsen leg pain may be limited until symptoms improve.

2. Medications

Non-opioid pain medicines, such as nonsteroidal anti-inflammatory drugs, may be used to reduce pain and inflammation. Some people may be prescribed other medicines depending on their symptoms and medical history.

A short course of oral steroids may be considered in some cases. Medication should be guided by a healthcare professional, especially for people with other health conditions or those taking other medicines. Learn more about medication for lower back pain that your doctor may prescribe.

3. Physical therapy

Physical therapy can help improve movement, strength, flexibility, and function. Treatment may include guided exercises, posture training, mobility work, and education on safer movement patterns.

Some studies have evaluated spinal manipulation or spinal mobilization techniques for subacute or chronic lumbar radiculopathy. These approaches may be considered in selected cases when performed by trained professionals.

4. Epidural steroid injections

Epidural steroid injections may be used when pain is persistent or severe and has not improved with initial treatment. The goal is to reduce inflammation around the irritated nerve root.

These injections may help reduce pain in the short term for some people. They are often considered when symptoms affect daily activities or when surgery is not the preferred first option.

5. Surgery

Surgery may be considered when leg pain is severe, disabling, and continues after several weeks of conservative treatment. It may also be recommended sooner if there is progressive weakness or signs of a serious nerve problem.

For lumbar disc herniation with radiculopathy, surgery often aims to remove the material pressing on the nerve. Imaging findings should match the person’s symptoms before surgery is considered.

When to see a doctor

Medical care is recommended when lower back pain spreads down the leg, causes numbness or tingling, or does not improve with basic care. Evaluation is especially important when pain affects walking, work, sleep, or daily activities.

Urgent medical care is needed if there is new loss of bladder or bowel control, numbness in the groin or saddle area, severe or worsening weakness, fever, unexplained weight loss, or a history of cancer. These symptoms may suggest a more serious condition that needs prompt treatment.