Lumbar Radiculopathy

Lumbar Radiculopathy: a complete guide to understanding and treating nerve irritation

Lumbar radiculopathy affects a nerve root in the lower back—that is, the part of the nerve near where it exits the spine. It can cause pain in the leg, numbness, or weakness. Despite sometimes severe pain, most people with radiculopathy caused by a herniated disc improve without surgery¹. The time frame varies: among 622 workers who had experienced sciatic pain in the leg, 55% reported symptoms two years later and 53% four years later². These symptoms may persist or recur. Non-surgical treatment through physical therapy can help you manage your symptoms and resume your activities.

What is lumbar radiculopathy?

Lumbar radiculopathy refers to damage to one or more nerve roots in the lower back, typically caused by irritation or compression. This condition can affect sensation or strength in the leg and may be accompanied by pain along the nerve’s path. The term comes from the Latin word *radix*, meaning “root.” A healthcare professional evaluates the symptoms and nerve function to make a diagnosis.

Sciatica refers to pain along the course of the sciatic nerve, often on the back of the leg. Cruralgia, on the other hand, follows the course of the crural nerve—also known as the femoral nerve—on the front of the thigh. Damage to the nerve roots that contribute to these nerves can cause this pain. These terms primarily describe the path of the pain; they are not sufficient to identify its cause.

What is a nerve?

A nerve is a group of fibers that transmit electrical signals throughout the body. The spinal cord, a bundle of nerves inside the spine, transmits messages between the brain and the body. Nerve fibers facilitate communication between the muscles, skin, spinal cord, and brain. The nerve roots in the lower back and pelvis come together to form the nerves of the legs, which extend all the way to the feet. These nerves are involved in the sense of touch and in the signals that control muscle movement.

When a nerve root or nerve is affected, the transmission of these signals may change. The person may experience pain, numbness, or tingling, or lose strength in the area served by that nerve.

What are the symptoms of lumbar radiculopathy?

Symptoms of lumbar radiculopathy may include leg pain, numbness, tingling, or weakness, with or without back pain. The pain may affect the buttock, thigh, calf, or foot. Its path provides a clue as to which nerve root is affected, but does not always follow a precise pattern. The areas of skin associated with the nerve roots vary from person to person and overlap³.

The pain may feel like a burning sensation or an electric shock. These sensations may accompany nerve irritation, but they do not, on their own, prove its cause. Report any new weakness to a healthcare professional; significant weakness or weakness that is getting worse requires prompt medical attention.

Some people experience more symptoms when they round their backs, while others do so when they arch their backs. These reactions to movement help in adapting exercises and positions. They do not constitute two distinct diagnoses and do not encompass all forms of radiculopathy.

Symptoms worsen when the back rounds

For some people, movements that round the lower back increase pain. Sitting for long periods or driving can become uncomfortable. Bending over to put on stockings, pants, underwear, or shoes can also trigger symptoms. The reaction varies depending on the person and the position. Sneezing or coughing can also increase sciatic pain.

Symptoms worsen when the back arches

For other people, positions that arch the lower back can increase pain. Prolonged walking or standing can become uncomfortable—for example, at the grocery store, while cooking, in line, or during a show. Your walking pace can also affect your comfort: try a slightly different pace, but only if it remains tolerable and safe for you. A faster pace isn’t right for everyone.

Lying on one's stomach or back with the legs extended can also trigger symptoms in these individuals. Putting away items in high places—such as in a kitchen cabinet—can cause the back to arch and increase pain.

A single person may experience symptoms in both directions. The evaluation identifies the movements and positions that are best tolerated and then monitors their effectiveness as treatment progresses.

What are the serious symptoms to watch out for?

Serious symptoms to watch for include significant weakness, loss of sensation, new difficulty walking, or changes in urinary or bowel function. If you have sciatic pain, the signs listed below require urgent evaluation. Do not wait for all of them to appear, and do not continue exercising to test for them.

Go to the emergency room if you experience paralysis or significant new or worsening weakness in one or both legs, or a significant loss of sensation. Sciatic pain on both sides also requires evaluation in the emergency room. A recent loss of balance or a new, significant difficulty coordinating your legs must be evaluated immediately.

Also go to the emergency room if you suddenly have trouble starting to urinate, if you can no longer urinate, or if you lose control of your urine or bowel movements. A loss of sensation around the genitals or anus—especially when you wipe—is another warning sign. This is also the case if you no longer feel the urge to have a bowel movement. These signs may indicate cauda equina syndrome, a compression of the cluster of nerve roots at the base of the spine. Hospital evaluation must be prompt; surgery may be necessary to prevent permanent damage. See the urgent signs guide from the NHS, the UK’s public health service.

Cauda equina syndrome is rare. A review reports approximately 1 case per 1,250 people—or 0.08 percent—in a single study of individuals seeking primary care for low back pain⁴. This figure does not represent the entire physical therapy patient population. Most cases of lower back pain are not medical emergencies, but the aforementioned warning signs should be evaluated even if they are rare.

What causes lumbar radiculopathy?

Lumbar radiculopathy can be caused by a herniated disc or by a narrowing of the nerve passageway, known as stenosis. A disc is a cushion between two vertebrae, the bones of the spine. A herniation occurs when part of the disc protrudes and may irritate or compress a nerve root. Trauma can also damage the tissues of the back. Pain sometimes appears after a specific event, and sometimes without an obvious trigger.

Unusual physical activity may precede or exacerbate symptoms. Examples include spring or fall cleaning, spending an entire weekend gardening, or driving for 10 hours in a single day. These prolonged efforts may exceed your current tolerance level. However, their presence does not necessarily indicate a disc or nerve root injury.

After a period of reduced activity, certain daily tasks may become more difficult. A physical therapist can help you gradually resume your activities. A decrease in activity does not, in and of itself, mean that the muscles or nerves in your back are damaged.

A new job, sport, or activity changes the demands placed on your back. If your symptoms worsen, it may be helpful to adjust the duration, frequency, or intensity, and then gradually increase them based on your tolerance. An increase in symptoms alone is not enough to conclude that a nerve has suffered a new injury.

A car accident or a fall can cause a back injury, sometimes a lumbar herniated disc that affects a nerve root. Pain following a movement that feels like a “wrong move” does not necessarily indicate such an injury. After an injury, severe pain or new neurological symptoms require a medical evaluation.

How is lumbar radiculopathy diagnosed?

A healthcare professional diagnoses lumbar radiculopathy by evaluating your symptoms along with a test of strength, sensation, and range of motion. The physical therapist or doctor will ask you about when the pain began, what makes it worse or better, and how it affects your daily activities. They may also test your reflexes, which are automatic muscle responses. All of these results are important; no single test alone can determine the diagnosis.

Magnetic resonance imaging, or MRI, produces images using a magnetic field. It can reveal changes in the discs or joints in people with or without pain. In a study of 3,369 people, 76.4% had at least one visible change; this percentage applied to the entire group, not just those without pain. Most associations with current or future pain were weak. Among people who were pain-free at the start, having at least five visible changes was associated with a more pronounced increase in pain at six years. The average difference was 1.21 points out of 10, compared with people who had no visible changes⁵. Imaging findings should therefore be interpreted in conjunction with symptoms and physical examination. An MRI is not routinely indicated; it may be warranted if a serious problem is suspected or if the results would alter the course of care. Refer to the UK NICE guidelines on imaging.

When to consult a physiotherapist for lumbar radiculopathy?

You can see a physical therapist if the pain in your leg persists, worsens, or limits your activities—after checking for the warning signs described above. Physical therapy for lower back pain involves exercises, advice, and treatments tailored to the results of your evaluation. If any warning signs appear, go to the emergency room first.

You can see a physical therapist directly, without first seeing a doctor. The physical therapist will assess your condition and may refer you to a doctor or another healthcare professional if necessary. This direct access does not replace an urgent medical evaluation when the aforementioned symptoms are present.

What are the physiotherapy treatments for lumbar radiculopathy?

Physical therapy treatments for lumbar radiculopathy include exercises, manual techniques, and advice on how to adapt your activities. The physical therapist first assesses your symptoms and the mobility of the different parts of your spine. The therapist also uses movements to check how your nerves respond to movement and tension. This assessment guides the treatment for nerve pain.

The physical therapist observes the positions and movements that increase or decrease your symptoms. They also measure your strength and your ability to control trunk movements. These observations are used to tailor your treatment; they do not mean that there is only one correct posture or one correct way to move.

Joint mobilization and manipulation are movements applied to the joints by hand. They may be part of a plan to reduce pain and improve movement. The choice depends on your condition and how you respond; nerves are not joints that should be manipulated. Instead, gentle, tailored movements can be used to help them move. NICE, the British organization that publishes these recommendations, suggests considering manual therapy as part of a program that includes exercises. Read the recommendations on back pain and sciatica.

In a trial involving 220 adults aged 18 to 60 with sciatica lasting less than 90 days, four weeks of physical therapy—including exercises and manual therapy—improved daily functioning at six months and one year more than an educational session alone. All participants were allowed to receive standard medical care. The study does not allow for isolating the contribution of each technique. Read the study by Fritz and colleagues.

Home exercises are designed to reduce pain and make it easier for you to move.The McKenzie method specifically looks for a “directional preference”—a direction of repeated movement that improves symptoms. Centralization is another sign: the pain gradually shifts away from the foot or leg and moves closer to the back. A review found that one or the other of these signs is present in about two out of three people with low back pain. These signs are associated with a more favorable outcome, but they are not sufficient on their own to determine the best treatment⁶. Exercises for the stabilizing muscles build strength and control in the core muscles, including the deep muscles that help support the spine.

The physical therapist helps you determine the amount of activity you can handle and then gradually increase it. The advice covers work, leisure activities, and the positions and movements that matter to you. The plan evolves based on your progress and symptoms.

What to do at home for lumbar radiculopathy?

Home care focuses on movements you can tolerate, changes in position, and a gradual return to activities. Temporarily limit movements that cause too much pain, then gradually reintroduce them. Avoid staying in bed or remaining completely immobile for long periods of time. If an urgent symptom arises, the previous medical instructions take precedence over this advice.

For recent lower back pain, also known as lumbago, a review found that advising patients to stay active led to better outcomes in terms of pain and functional ability than bed rest⁷. In studies on sciatica, this comparison shows little or no clear difference⁷. This limitation pertains to two specific recommendations, not to physical therapy as a whole. The NHS nevertheless recommends continuing your usual activities as much as possible and starting gentle movements suited to your abilities. Read the NHS’s advice on sciatica.

If symptoms worsen when the back rounds

If sitting for long periods makes your symptoms worse, take breaks to walk around a bit. You can start by taking a break after 20 minutes, then adjust this interval based on what feels comfortable for you. One study measured the pressure in the disc between the fourth and fifth lumbar vertebrae in a single 45-year-old man. The pressure was 0.46 MPa while sitting without support and 0.5 MPa while standing at rest. It reached 0.83 MPa while sitting with the back leaning as far forward as possible, compared to 1.1 MPa while standing and leaning forward⁸. MPa stands for megapascal, a unit of pressure. These measurements pertain to the disc of a single individual. They do not measure pain or nerve root irritation, nor do they prove that a particular posture damages your back.

When sitting, try to straighten your lower back slightly or place a small rolled-up towel behind you. Keep this support only if it makes you more comfortable. You can also vary your posture; it’s not necessary to maintain a specific curve all day long.

Walk for a duration that feels comfortable. Running may also be an option, depending on your symptoms and abilities; seek advice before resuming running if you feel weak or have difficulty walking. The goal is to stay active in a way that’s appropriate for you, without trying to force your back into a “neutral” position.

Among 701 adults who had recently recovered from low back pain with no specific identified cause, a progressive walking and education program delayed the return of pain that limited activities, compared with no program. The median time to recurrence was 208 days versus 112 days: half of the participants in each group had experienced a recurrence by that point⁹. This finding supports prevention following low back pain; it does not address the treatment of ongoing radiculopathy.

When driving, try to sit all the way back in the seat, with the backrest tilted slightly backward. Adjust the distance to the steering wheel so you don’t have to stretch, while still maintaining safe access to the pedals and controls. To lean forward, you can try shifting your hips back slightly and bending at the hips more, if that feels comfortable to you.

If these positions provide relief, you can spend a few minutes lying on your stomach or on your back with your legs extended. Change positions if the pain increases or travels further down your leg. These positions may be uncomfortable for the group described in the following section.

If symptoms worsen when the back arches

If standing increases your pain, try taking breaks to sit down. A break after 20 minutes can serve as a starting point; adjust this as needed based on your comfort level. When you have to stand, you can place one foot slightly in front of the other and gently shift your weight forward and then backward, if your balance allows it. Only continue this movement if it helps you.

When cooking, you can try placing one foot on a small, stable footrest in front of you. This can cause your lower back to arch slightly; keep this position if it provides relief and if you can maintain good balance. You can also lie on your side for a few minutes with a pillow between your knees. Choose a comfortable position without trying to force your spine into a specific alignment.

Seek medical attention if home care is not helping, if the pain is getting worse, or if it is preventing you from carrying out your daily activities. You do not need to wait 10 days to request an evaluation. If you experience any urgent symptoms, seek medical attention immediately, following the instructions above.

How does lumbar radiculopathy progress over time?

Lumbar radiculopathy often improves without surgery, over a period of several weeks to several months, but some people experience more persistent symptoms. Benoist’s review of herniated discs describes a reduction in symptoms within one or two weeks in some people, compared with several months or years in others. The follow-up study of workers cited at the beginning also shows that symptoms can persist or recur. Changes in your strength, sensation, and activity levels help guide adjustments to your treatment plan. Read the review on the progression of herniated discs.

What back problems can accompany lumbar radiculopathy?

Lumbar radiculopathy can occur alongside a herniated disc, spinal stenosis, or pain in the small joints of the back. A herniated lumbar disc and spinal stenosis—a narrowing of the nerve passageway—can irritate or compress a nerve root. Spinal stenosis becomes more common with age. Lumbar facet syndrome refers to pain associated with the small joints located at the back of the spine. It can coexist with radiculopathy, though the two are not the same condition.

A herniated disc may shrink or disappear over time without surgery. A review notes this progression in patients treated with non-surgical care, with varying rates depending on the type of herniation¹⁰. The reduction visible on imaging and the improvement in symptoms are not exactly the same measure.

Low back pain simply refers to pain in the lower back. It may occur alongside radiculopathy. Treatment in such cases aims to reduce back pain and pain that radiates down the leg, and to make it easier to perform daily activities.

How can you get help for your lumbar radiculopathy?

Our physical therapists can assess your symptoms, explain the results of the evaluation to you, and work with you to develop a plan for resuming your activities. The evaluation helps identify the factors contributing to your difficulties and determine whether a medical evaluation is necessary.

You can schedule an appointment if your symptoms persist or limit your activities—you don’t have to wait for them to last several months. If any of the urgent signs described above appear, go to the emergency room rather than waiting for an appointment. Outside of these situations, an evaluation can provide you with concrete guidance on how to manage your pain and make progress.

Sources

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8. Wilke HJ, Neef P, Caimi M, Hoogland T, Claes LE. New in vivo measurements of pressures in the intervertebral disc during daily life. Spine (Phila Pa 1976). 1999;24(8):755-62. (Back to section: 1)
9. Pocovi NC, Lin CC, French SD, Graham PL, van Dongen JM, Latimer J, et al. Effectiveness and cost-effectiveness of an individualized, progressive walking and education intervention for the prevention of low back pain recurrence in Australia (WalkBack): a randomized controlled trial. Lancet. 2024;404(10448):134-144. (Back to section: 1)
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