Sciatica in Montreal: L5 and difficulty lifting the foot

IN BRIEF

In Montreal, a sciatica accompanied by new difficulty in lifting the foot may signal weakness related to the involvement of a nerve root, often L5, but other causes are possible. This symptom increases the risk of falling and necessitates a rapid medical evaluation rather than waiting or starting intensive exercises without advice. In case of progressive weakness, urinary or bowel disorders, or numbness in the perineum, go to the emergency room immediately.

A sciatica accompanied by new difficulty in lifting the foot requires prompt medical evaluation. This weakness may indicate an involvement of the L5 nerve root, often related to a herniated disc, but other causes are possible. The examination must assess strength, sensitivity, and gait, then determine if imaging or another specialized opinion is necessary.

Foot drop refers to difficulty in lifting the toe upward. The person may catch the ground while walking, lift the knee higher to move forward, or place the foot with a slap. This gait is sometimes referred to as steppage gait.

When this weakness appears with pain that starts from the lower back and radiates down into the buttock or leg, lumbar nerve involvement is possible. However, the path of the pain alone is not enough to confirm the diagnosis. A clinical examination allows for comparison of symptoms, strength, sensitivity, reflexes, and gait.

Why the L5 root may affect the foot

The L5 root is involved in controlling several muscles that lift the foot and toes. A herniated disc, often located between the L4 and L5 vertebrae, can irritate or compress this root. If the nerve signal is diminished, some muscles may lose strength.

Pain radiating down to the foot can also involve other roots, including S1. Symptoms do not always follow a perfectly typical path. To better understand the lumbar levels visible on an image, consult our page on sciatica in Montreal and lumbar levels on an MRI.

A weakness of the foot is a warning sign

Painful sciatica without loss of strength is often managed without immediate urgency. A new or progressive weakness changes the situation. If the foot becomes difficult to lift, contact a doctor or emergency service quickly based on the intensity and evolution of the symptoms. Do not wait several days to see if the weakness resolves on its own.

Go to the emergency room immediately if the weakness is accompanied by loss of bladder or bowel control, difficulty urinating, or loss of sensation around the perineum. Anesthesia in this area may suggest serious nerve compression. Rapid worsening, fever with back pain, or significant trauma also warrant urgent evaluation.

The difficulty in lifting the foot increases the risk of tripping and falling. While waiting for medical advice, avoid activities that expose you to a fall. Do not start intensive exercises or stretching to try to correct the weakness without having received professional advice.

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Foot drop is not always caused by sciatica

Compression of the L5 root in the lower back can cause foot drop, but it is not the only explanation. The fibular nerve can also be compressed near the knee. More rarely, a condition affecting the brain, spinal cord, nerves, or muscles can lead to similar weakness.

The doctor considers the presence or absence of lower back pain, when the weakness started, positions that compress the knee, and other neurological signs. A weakness of the foot without back pain may particularly prompt exploration for an involvement located lower along the nerve path.

Numbness can provide useful information, but it cannot alone identify the cause. To learn more, consult our article on numbness of the toes associated with sciatica. This resource is external to the site.

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How the doctor evaluates strength and cause

The examination begins with the history of symptoms: their onset, duration, affected side, trajectory, and factors that aggravate or relieve them. The professional then checks the gait and compares the strength of both legs. They may test the ability to lift the foot and toes, examine sensitivity, and assess reflexes.

Based on the results and evolution, the doctor may request a lumbar MRI to search for a herniation or another cause of compression. An electromyogram can help clarify where the nerve is affected, for example, near the lumbar root or at the knee level. Imaging should answer a clinical question; it does not replace examination.

An image showing a disc abnormality does not automatically prove that it is responsible for the weakness. The doctor correlates the imaging results with symptoms and neurological examination.

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Management depends on the cause and severity

The care plan is determined based on the identified cause, the extent of strength loss, and its evolution. If a herniation compresses a nerve root and causes weakness, a specialized medical opinion may be required quickly. Decompression intervention may be considered in certain situations; the decision belongs to the specialist doctor after evaluation.

A brace that holds the foot in position can sometimes secure walking during recovery. The healthcare professional indicates if this option is appropriate and how to use it. Recovery of strength may be slower than pain relief and varies from person to person.

Manual therapy or non-surgical approaches should not delay the medical evaluation of a motor deficit. New weakness, worsening, or signs of urgency require a prompt reassessment of the course of action. To discover the service information from the TAGMED Clinic regarding sciatica and foot drop, please consult the corresponding page, without replacing urgent medical advice needed in case of muscle strength loss.

Symptoms may vary throughout the day

Pain may change with position, activities, and time of day. However, experiencing more intense pain at the end of the day or upon waking is not, by itself, sufficient to confirm L5 involvement. Report any changes in pain, numbness, or strength to your healthcare professional.

You can read our pages on end-of-day pain and pain upon getting out of bed. These variations should be interpreted with all signs, not in isolation.

Tolerance for stabilization also varies according to symptoms and cause. In the presence of foot weakness or suspected disc compression, seek medical advice before adding exercises to your routine. Consult our page on sciatica and variable stabilization tolerance.

Frequently Asked Questions About L5 and Foot Drop

Is foot weakness with sciatica urgent?

New or progressive weakness requires prompt medical evaluation. If accompanied by urinary or bowel disturbances, saddle anesthesia, or significant worsening, go to the emergency room immediately.

Does an L4-L5 herniation always cause foot drop?

No. A herniation located between L4 and L5 can compress the L5 root, but it does not always cause weakness. The presence and severity of symptoms depend on the situation. Other causes may also explain foot drop.

Can the foot regain strength?

Recovery is possible, but it depends on the cause, the extent of nerve damage, and the speed of management. Strength may return more slowly than pain. A healthcare professional should monitor the progress.

Does pain need to reach the toes to indicate L5?

No. Pain may stop at the buttock, thigh, calf, or foot. The pathway helps guide the examination but does not confirm the affected root by itself. For another example of pain extending toward the foot, consult our page on L5-S1 sciatica and pain that may descend to the foot.

Should I wait for a clinic appointment before seeing a doctor?

No, not if you have new or worsening loss of strength. Medical evaluation must be a priority. A non-urgent clinical service does not replace emergencies or a doctor’s advice when warning signs are present.

For general information on the causes and symptoms of sciatica, you can also consult our page dedicated to the functioning and causes of sciatica. This resource is external to the site.

About the Author

Sylvain Desforges, B.Sc., D.O., N.D., osteopath and naturopath, is the founding president of TAGMED and the ACMA association. He dedicates his practice to chronic spinal pain, lower back pain, and pain compatible with sciatica, particularly when the pain radiates to the buttock, leg, calf, foot, or toes.

Through SOS Sciatica, he publishes educational content on the symptoms of sciatica, its possible causes, and non-surgical approaches that may be considered based on the evaluation. At TAGMED Clinic, care may include, depending on the case, motorized neurovertebral decompression, specific osteopathy, or precision percussor. These approaches do not replace urgent medical evaluation in the presence of foot weakness.

For an evaluation regarding sciatica treatment in Montreal or Mont-Royal, or sciatica treatment in Terrebonne, consult the services available at TAGMED Clinic. New or progressive weakness first requires prompt medical evaluation.

Medical Disclaimer

Medical disclaimer: The information and advice provided on this site do not replace the opinion, diagnosis, or treatment of a healthcare professional. Please note that Dr. Sylvain Desforges, osteopath, is neither a medical doctor nor a physician, and is not a specialist in a medical specialty as defined by the Collège des médecins du Québec. Manual medicine, functional medicine, and sports medicine as described on this site exclude any treatment or diagnosis by a physician or medical specialist. Always consult your doctor for any medical questions. For more details, please read our full Legal Notice.

In Montreal, sciatica accompanied by a new difficulty in lifting the foot can indicate motor involvement of the L5 nerve root. A foot that drags on the ground or falls while walking is not just a pain to manage alone: immediate medical advice is needed to determine its cause and severity. If there are urinary issues, loss of sensitivity in the perineum, or worsening weakness, go to the emergency department immediately.

Recognizing a foot drop related to L5

The L5 root is involved in controlling the muscles that pull the foot and toes upward. Irritation or compression in the lower back, sometimes associated with a herniated disc, can reduce their strength. The person may then need to lift the knee higher to move forward, trip, or hear the foot drop with a snap. This way of walking is called foot drop.

Pain in the buttock or leg may accompany this weakness, but its intensity alone does not measure the nerve’s involvement. A decrease in strength, even if the pain seems moderate, deserves quick evaluation. Foot drop can also result from nerve compression near the knee or another neurological cause: thus, it should not be automatically concluded to be sciatica.

When to seek help in Montreal

New or progressive weakness

If you have recently lost strength in lifting your foot, contact a doctor or healthcare service quickly for an evaluation. Specify exactly when the problem began, if it is worsening, and if you have tripped or fallen. Significant or rapidly progressive weakness warrants urgent evaluation. Do not delay this action to first try exercises or manual therapy.

Signs requiring urgency

Call emergency services or go directly to the hospital if the weakness is accompanied by difficulty urinating, incontinence, loss of bowel control, or numbness around the genitals and anus. Fever with back pain, a significant trauma, or rapid aggravation also requires urgent medical attention.

What to expect during evaluation

The healthcare professional will check walking, strength of the foot and leg, sensitivity, and reflexes. They will also try to distinguish an issue stemming from the spine from a lower compression, for example at the knee. Based on the results and evolution, a lumbar MRI or a nerve conduction study, like an electromyogram, may be considered if the information is likely to change management.

Before the appointment, note the pain pattern, sensory changes, positions that worsen symptoms, and activities that have become difficult. If walking is uncertain, limit moving alone and clear obstacles to reduce the risk of falling. A foot brace may sometimes be suggested by the care team to secure walking.

Choosing safe management

Treatment depends on the cause and severity of the deficit. When a hernia compresses a root and causes a loss of strength, a specialized consultation is important; a decompression intervention may be considered based on medical evaluation. Rehabilitation and exercises should be tailored to the situation and started according to the recommendations of the team caring for you.

An evaluation in osteopathy or in a clinic of non-surgical care does not replace the required medical examination in cases of foot weakness. In Montreal, prioritize a pathway that documents strength, walking, and evolution, and clearly specifies when to seek medical or specialized advice. Avoid manipulations or intensive exercises before having this new motor deficit evaluated.

About the author and disclaimer

Sylvain Desforges, B.Sc., D.O., N.D., osteopath and naturopath, is the founding president of TAGMED and the ACMA association. He publishes educational content on chronic spinal pain and symptoms compatible with sciatica.

This text is provided for educational purposes and does not replace a consultation, diagnosis, or treatment by an authorized healthcare professional. The author is neither a doctor nor a specialist in a medical specialty recognized by the College of Physicians of Quebec. In the presence of foot weakness or signs of urgency, consult without delay.

Illustrative testimonials: sciatica in Montreal, L5 involvement, and difficulty lifting the foot

Important: the stories below are fictitious examples created for educational purposes. They do not recount the experiences of actual patients and do not predict the evolution of a person. A new difficulty in lifting the foot with sciatica may signal a neurological weakness and requires rapid medical evaluation.

Marc, 52 years old — “My foot was catching on the sidewalk”
While walking in his neighborhood in Montreal, Marc notices that the tip of his right foot sometimes catches on the ground. He lifts his knee higher to avoid tripping and also feels pain that radiates from his lower back down to his leg. He consults quickly rather than waiting for the weakness to disappear. The medical team evaluates the strength of the foot, sensitivity, and gait to determine the cause of the symptoms.

Élise, 47 years old — “The pain was bearable, but the weakness worried me.”
Élise feels pain in her buttock and along her leg. What alerts her is that she is less able to pull her toes toward her. Her account illustrates an important distinction: the intensity of pain does not always measure the severity of a nerve issue. A loss of strength warrants medical advice without delay, even if the pain remains moderate.

André, 61 years old — “I wanted to know if it really came from my back.”
André exhibits weakness in his foot, but his symptoms do not exactly follow the usual path of sciatica. The assessment therefore aims to determine whether the issue concerns a lumbar nerve root, like L5, or rather a peripheral nerve near the knee. This kind of approach reminds us that a drop foot does not automatically stem from a disc herniation: a clinical examination, and sometimes additional tests, help to clarify the origin.

Sophie, 55 years old — “I asked for help after stumbling.”
After several missteps, Sophie notices that her foot is less able to lift and that she must watch every irregularity on the sidewalk. Weakness in the dorsiflexor muscles can increase the risk of falling. Medical evaluation can determine the necessary measures to investigate the cause and secure her gait, such as rehabilitation or an orthosis if indicated.

In sciatica related to damage to the L5 root, weakness in the muscles that lift the foot can occur. However, the path of the pain or the presence of a herniation on imaging alone is not sufficient to establish the diagnosis. The healthcare professional considers strength, sensitivity, reflexes, gait, and the evolution of symptoms.

If you have a new difficulty in lifting your foot, progressing weakness, or falls, seek medical evaluation promptly. In case of loss of bladder or bowel control, numbness around the perineum, or significant or rapidly increasing weakness, consult an emergency service immediately. These fictional testimonies do not replace medical advice or a personalized examination.

Sciatica in Montreal: understanding the link between the L5 root and difficulty in lifting the foot

Dr. Sylvain Desforges, B.Sc., D.O., N.D., is an osteopath and naturopath, founding president of TAGMED clinics and ACMA association. Throughout his career, he has dedicated himself to chronic pain, particularly those affecting the spine and lower back. His approach focuses on symptoms compatible with sciatica, their repercussions on daily activities, and the need to distinguish nerve pain from other possible causes.

In Montreal, a consultation for pain radiating down the buttock or leg can raise important questions: which structure is involved, which nerve root might be irritated, and which signs should be taken seriously? Among these, difficulties in lifting the foot deserve particular attention. The person may feel that their toes are catching on the ground, may stumble more frequently, or must lift their knee higher to move forward. This gait, sometimes called steppage, may indicate muscle weakness rather than mere pain.

The nerve root L5 is involved in the control of several muscles that lift the foot and toes. When it is compressed or irritated in the lower back, for example in certain cases of disc herniation, the strength of these muscles may decrease. Pain may accompany this weakness, but it is not always the best indicator of the nerve’s condition. Therefore, it is also important to assess gait, strength, sensitivity, and the evolution of symptoms.

A foot that lifts less well does not necessarily derive from the spine. Compression of the fibular nerve near the knee or, more rarely, another neurological condition can produce a similar picture. The evaluation must therefore explore various possibilities rather than automatically attributing the symptom to sciatica. Depending on the findings and the situation, a healthcare professional may recommend a medical examination, imaging or additional tests.

A new or progressive weakness in the foot requires prompt medical evaluation. One should not wait for it to disappear or attempt to correct it alone with intensive exercises or manipulations. Difficulty in walking also increases the risk of falling. If the weakness is accompanied by loss of bladder or bowel control, numbness around the perineum, significant weakness or rapid deterioration, one should go immediately to an emergency service.

At TAGMED Clinic, services may include, depending on the case, specific osteopathy, motorized neurovertebral decompression, and other non-surgical approaches. However, when there is a motor deficit such as drop foot, the priority is to have the problem evaluated quickly by a qualified medical professional. Manual therapy or functional assistance does not replace this approach and should not delay an appropriate referral.

The course of action depends on the diagnosis and the severity of the condition. It may involve medical follow-up, prescribed rehabilitation, measures aimed at securing walking, or, in certain situations, an intervention to relieve a compressed nerve root. Dr. Sylvain Desforges’ role is to contribute to a cautious and individualized approach when appropriate, taking into account symptoms, function, and recommendations from the professionals responsible for the follow-up.

The information published is educational and does not replace a consultation, diagnosis or medical treatment. Dr. Sylvain Desforges is an osteopath and naturopath, and not a physician or a specialist in a medical specialty recognized by the Collège des médecins du Québec. In the presence of foot weakness, consult a licensed healthcare professional promptly.

In Montreal, a sciatica associated with a new difficulty in lifting the foot must be evaluated quickly. This sign may correspond to a motor deficit related to damage to the L5 root, sometimes caused by a disc herniation, but other nerve problems can also produce drop foot. The clinical examination serves to clarify the origin, measure strength and gait, and then determine if urgent examinations or management are necessary.

When the foot catches on the ground, when its tip lifts with difficulty, or when it is necessary to excessively lift the knee to walk, it is not just a matter of managing pain: a loss of strength may signal a neurological issue. If this change is new or worsening, contact a healthcare professional or medical service quickly. In cases of significant or progressive weakness, difficulty urinating or controlling bowel movements, or numbness around the perineum, go immediately to the emergency room.

The L5 root often contributes to the movement that raises the foot. A compression at the level of the L4-L5 disc can therefore be part of the possible causes, but the pathway of the pain alone does not confirm the level affected. To better understand the differences between L4-L5 and L5-S1 conditions in Montreal, you can consult this guide, as well as the resources dedicated to the difference between L4-L5 and L5-S1 and to the pain in the leg according to the affected disc.

A dropped foot is not necessarily caused by the back. Compression of the peroneal nerve near the knee or another neurological condition can produce similar weakness. The evaluation must therefore relate symptoms to an examination of strength, sensitivity, reflexes, and gait. An evaluation of sciatica in Montreal can help organize these elements, while explanations about the pain pathway associated with L5 provide additional information. Imaging, such as MRI, or an electromyogram may be considered by the competent professional when results could clarify the course of action.

The resources on L5 sciatica and on L5-S1 protrusion with pain towards the foot can help understand certain conditions without establishing a diagnosis at a distance. Similarly, pain that seems to change with walking, as explained on this page about sciatica that improves while walking, does not rule out neurological weakness: the strength of the foot must be evaluated separately.

The priority is to not wait for the weakness to resolve on its own and to secure movements to reduce the risk of falling. After the evaluation, the plan will depend on the cause and severity: a specialized medical opinion, additional examinations, an intervention aimed at decompressing a nerve in certain situations, rehabilitation, or a brace may be considered. Management and follow-up should be decided with the relevant professionals; non-surgical care does not replace urgent medical evaluation when a motor deficit appears.

Readers in the area who wish to compare local resources can also consult the information intended for Terrebonne on L4-L5 and L5-S1 discs and the pain in the leg. Regardless of the location, remember the main point: a new difficulty in raising the foot with sciatica justifies a prompt evaluation, and urinary signs, intestinal issues, or numbness in the perineal region require immediate attention.

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