
Sciatica in Montreal: L5 and difficulty lifting the foot
23/10/2026
Sciatica and pain that worsens when walking
23/10/2026IN SHORT The L5 sciatica can cause pain or numbness on the side of the leg, the top of the foot, and the big toe, sometimes with difficulty lifting the foot. In Terrebonne, an evaluation compares strength, sensitivity, reflexes, and walking to guide management and check for other possible causes, such as injury to the fibular nerve. New or progressive weakness or a dropped foot requires prompt medical evaluation. |
Irritation of the L5 nerve root can cause pain or numbness on the side of the leg, the top of the foot, or near the big toe. Difficulty in lifting the foot or big toe may also be present, but it can have other causes, such as injury to the fibular nerve. The examination compares strength, sensitivity, and gait; symptoms alone do not confirm the cause. In Terrebonne, an evaluation can help specify management options. Seek care quickly in case of new or progressive weakness, a foot that drags, urinary or bowel issues, or numbness in the saddle area.
Pain that radiates down the side of the leg to the top of the foot or the big toe may correspond to irritation of the L5 nerve root. If the foot or big toe becomes difficult to lift, strength and walking should also be checked: new or progressive weakness requires prompt assessment. In Terrebonne, the examination must compare symptoms, sensitivity, strength, and other possible causes before choosing a management plan.
What symptoms may suggest an L5 nerve root injury?
The L5 root contributes to the sensitivity of certain areas on the side of the leg, the top of the foot, and the big toe. Irritation can cause pain, tingling, or numbness in these regions. However, the pathway varies from person to person and can overlap with that of other nerve roots.
L5 also contributes to lifting the foot and extending the big toe. Actual weakness can make these movements more difficult and alter gait. The person may drag the foot on the ground or have difficulty walking on their heels. These signs alone are not sufficient to confirm an L5 injury.
The pain may give a feeling of a heavy leg without loss of strength. The examination must therefore distinguish this sensation from measurable weakness. This difference helps determine the priority of the assessment.
Sciatica in Terrebonne: S1 and difficulty standing on tiptoe
IN SHORT An S1 sciatica can irritate the nerve root associated with the calf and make it difficult to rise onto the balls of the feet. This sign should be evaluated with strength, sensitivity, reflexes, and walking: the pathway of…
Why is difficulty lifting the foot a concern?
A recent difficulty in lifting the foot may indicate a motor impairment. A dropped foot, deteriorating gait, or progressive weakness require prompt medical evaluation. One should not wait until the end of a treatment program if function is declining.
An injury to the fibular nerve, also known as the peroneal nerve, can also cause weakness in the muscles that lift the foot. Symptoms may resemble those of L5 radiculopathy. The professional must compare several elements before pinpointing the origin of the problem.
New urinary or bowel problems, numbness in the saddle area, or significant progressive weakness may signal an emergency. One should then consult a medical or emergency service without delay.
Sciatica in Terrebonne: L4-L5 and pain towards the top of the foot
IN BRIEF A L4-L5 sciatica can radiate to the outer side of the leg and the top of the foot, sometimes reaching the big toe. This pathway can guide the assessment, though it does not suffice to confirm the cause:…
How does the examination differentiate L5 from other causes?
The evaluation begins with the history of symptoms: their onset, pathway, evolution, and impact on walking. The professional then compares strength on both sides, sensitivity, reflexes, and certain functional movements. No isolated test confirms or excludes an L5 injury by itself.
The pathway of pain and numbness
The professional identifies painful or numb areas and checks if they correspond to a plausible nerve territory. Dermatome maps provide guidelines, but their distribution varies and overlaps. To learn more about the differences between lumbar roots, refer to the guide on sciatica in Terrebonne related to levels L4-L5 and L5-S1.
Strength and gait
The examination may compare the ability to lift the foot and big toe, as well as heel walking. The professional also checks whether weakness affects stability or the quality of the step. A difference between both sides may guide the assessment but must be interpreted with the other clinical signs.
Reflexes and possible causes
Reflexes and sensitivity provide complementary clues. The professional may also examine the hip and lower back, as some pain from these areas can mimic nerve pain. He compares these observations before concluding whether there is an L5 root injury or a peripheral nerve issue.
Sciatica in Terrebonne: L5-S1 and symptoms in the calf
IN BRIEF A L5-S1 sciatica can cause pain that radiates down the calf, sometimes accompanied by tingling, numbness, or weakness. At Terrebonne, an assessment at the TAGMED Clinic helps to examine the symptom pathways, strength, and sensitivity, and then discuss…
What is the link between L5 and lumbar discs?
A herniated or protruding disc can irritate a nerve root. An injury located at L4-L5 can particularly affect L5, depending on its position. However, an imaging anomaly does not prove that it causes the symptoms: it must match the side, the painful pathway, and the signs observed during the examination.
To understand the possible link between a disc and a nerve root, also read the article on disc protrusion and sciatica. Pain towards the big toe may be compatible with L5, while pain that radiates down to the calf and the outer edge of the foot may suggest another territory, particularly S1. These pathways do not allow for a diagnosis on their own. Also consult the pages on L5 sciatica in Terrebonne and S1 sciatica in Terrebonne.
Sciatica in Terrebonne: pain in the big toe, L5 root or another cause?
IN BRIEF Pain in the big toe accompanied by pain in the buttock or leg may be compatible with irritation of the L5 root, but other causes are possible. In Terrebonne, the evaluation notably compares strength, sensitivity, and gait to…
When might imaging be helpful?
An MRI is not necessary in every situation. A professional may consider it if symptoms persist, if a motor deficit is present, or if the result may change management. Imaging must be interpreted along with the clinical examination, not separately.
Imaging that does not show obvious compression does not always rule out nerve irritation. Conversely, a visible anomaly may be unrelated to the pain experienced. The diagnosis relies on the concordance between symptoms, examination, and available results.
Sciatica in Terrebonne: why the affected root changes the pain path
IN BRIEF Sciatica is a pain related to the irritation of a lumbar nerve root, the path of which varies depending on the affected root. Damage to L5 can radiate to the top of the foot, while damage to S1…
What management options can be discussed?
The choice depends on the probable cause, the intensity of the symptoms, the neurological state, and their evolution. When the strength remains stable and no signs of urgency are present, a conservative plan can be discussed with a professional. This plan should specify the objectives, follow-up measures, and the expected time to reassess the situation.
The motorized neurovertebral decompression may be considered for certain patients when the assessment suggests a compatible discal or foraminal component. It is not suitable for everyone and does not replace a medical evaluation when significant or progressive weakness appears. An injection, further investigation, or a specialized opinion may also be considered depending on the clinical picture.
At the TAGMED Clinic, an assessment can help clarify the present signs and discuss suitable options. The available care depends on the professional, their qualifications, and their area of practice. The presentation of an approach on the site does not mean that every professional at the clinic personally implements it.
For those who hesitate to try stretching, this article explains why caution is important in certain situations: sciatica and popular stretches. In the presence of foot weakness, it is best to have the function assessed before adding movements or care.
Sciatica in Terrebonne: L4-L5 disc, L5-S1 disc, and leg pain
IN BRIEF Sciatica is pain that travels down the leg when a nerve root is irritated. An injury to the L4-L5 disc often affects the L5 root; an L5-S1 injury affects the S1 root. The path of the pain and…
What signs require prompt or urgent consultation?
Consult quickly if new weakness appears, if it increases, or if the foot begins to drag. A deterioration in walking also warrants prompt evaluation. Neurological symptoms should be monitored even if pain decreases.
Go to the emergency room in case of loss of control of the bladder or bowels, numbness in the saddle area, significant or rapidly progressive weakness, or marked neurological symptoms on both sides. Fever, recent trauma, or a rapid worsening also require medical evaluation.
Sciatica in Terrebonne: understanding lumbar levels on an MRI
IN BRIEF Sciatica may be related to irritation of a lumbar nerve root. A lumbar MRI shows the disks and nerves at different levels, such as L4-L5 or L5-S1, to help identify an abnormality and compare it with symptoms. In…
Frequently asked questions about L5 and difficulty lifting the foot
Does pain in the big toe always indicate L5 involvement?
No. Pain in the big toe can be compatible with L5, but other causes are possible. The pathway should be related to strength, sensitivity, and examination results.
Can difficulty walking on heels be related to L5?
Yes. Walking on heels engages the muscles that lift the foot. A professional may use it as part of an examination, but this sign alone does not confirm a diagnosis.
Can a hernia at L4-L5 affect the L5 root?
Yes, depending on the location of the hernia. The image must correspond to the side and clinical signs to be considered a possible explanation for the symptoms.
Can a dropped foot come from something other than L5?
Yes. Injury to the fibular nerve or another neurological cause can also reduce the ability to lift the foot. A recent or worsening dropped foot requires prompt evaluation.
Can weakness be significant even if the pain decreases?
Yes. Pain and strength do not always evolve the same way. Any decrease in strength or deterioration in walking should be reported, even if the pain seems less intense.
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 pain of the spine, low back pain, and pain compatible with sciatica, particularly when the pain radiates down to the buttock, leg, calf, foot, or toes.
Through SOS Sciatique, he publishes educational content on the symptoms of sciatica, possible causes such as disc herniation, disc pinching, foraminal stenosis, or irritation of a lumbar nerve root, as well as non-surgical approaches that may be considered based on the assessment. At the TAGMED Clinic, the care may include, depending on the case, motorized neurovertebral decompression, specific osteopathy, or precision percussion.
For an evaluation related to sciatica treatment in Montreal / Mont-Royal or sciatica treatment in Terrebonne, consult the available services at the TAGMED Clinic.
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 medical treatment or diagnosis performed by a physician or medical specialist. Always consult your doctor for any medical questions. For more details, please read our Complete Legal Notice.
Medical Warning
The information published on SOS Sciatique is provided for educational purposes and does not replace a consultation, diagnosis, opinion, or treatment performed by a physician or another authorized healthcare professional. The author of this article is neither a doctor nor a specialist in a medical specialty recognized by the Collège des médecins du Québec. The osteopathy, manual medicine, or functional support approaches described on this site do not constitute medical acts and are not intended to replace medical follow-up.
Consult a doctor or emergency service in case of loss of urinary or bowel control, anesthesia in the saddle area, significant or progressive weakness of the leg or foot, fever, recent trauma, severe pain, or rapid worsening. For more details, please read our Legal Notice.
Sciatica L5: signs to watch for
- Pain or numbness on the side of the leg, the top of the foot, or the big toe.
- Difficulty in lifting the foot or extending the big toe.
- The foot catching or difficulty walking on the heels.
- These signs can also have other causes, including damage to the fibular nerve.
Evaluation and next steps
- Compare strength, sensitivity, reflexes, and gait.
- Interpret the MRI in relation to symptoms and clinical examination.
- If the weakness is stable, discuss graded management and follow-up.
- Consult promptly if the foot drops or if weakness progresses.
- Emergency for urinary or bowel issues, or numbness in the saddle area.

In Terrebonne, pain that descends on the side of the leg to the top of the foot or the big toe, accompanied by difficulty lifting the foot, may indicate irritation of the L5 nerve root. This situation deserves careful evaluation: the localization of symptoms, strength, sensitivity, and gait should be examined together, as other nerves can produce similar signs.
Sciatica L4-L5 in Terrebonne: possible pain, numbness, and weakness
IN BRIEF L4-L5 sciatica refers to pain related to irritation of a nerve root in the lower back. It can radiate to the buttock and leg, with numbness or weakness. Identifying these symptoms helps guide evaluation and care. In Terrebonne,…
Recognizing possible signs of L5 damage
The L5 root is often associated with pain, tingling, or numbness on the side of the leg and on the top of the foot, sometimes extending to the big toe. Some individuals notice that their foot catches on the ground, that they trip more often, or that they have difficulty walking on their heels.
Difficulty in lifting the foot or extending the big toe may indicate motor weakness. It is important to distinguish it from a heavy leg sensation related to pain. A true, new, or progressive loss of strength should be reported promptly to a healthcare professional.
Why symptoms’ path alone is not enough
Maps of dermatomes and myotomes are guidelines, but the territories of L4, L5, and S1 overlap and vary from person to person. Furthermore, weakness in lifting the foot may also be related to the fibular nerve, rather than a lumbar root. Therefore, it is essential to avoid concluding L5 damage based on a single symptom.
Elements to compare during evaluation
The examination can compare both sides of the body, the sensitivity of the foot and leg, movements of the foot and big toe, reflexes, as well as heel walking and toe walking. The chronology of symptoms and their evolution is also important. An MRI may be considered if its results are likely to change management; it should be interpreted in connection with clinical signs, the affected side, and the relevant level.
Recommendations for management
When neurological signs are stable, a conservative approach may include adapted activity, a gradual progression of movements and rehabilitation, as well as monitoring of strength and gait. Avoid prolonged bed rest and exercises that significantly exacerbate symptoms. The plan should be reassessed if function does not improve or if new signs appear.
Neurovertebral decompression can be discussed for some individuals when the evaluation suggests a relevant discal or foraminal component. It is not suitable for all situations and does not replace medical evaluation when weakness appears or progresses. Depending on the severity and duration of symptoms, further investigation, an injection, or a specialist opinion may also be considered.
When to seek a quick evaluation
Consult without delay for a routine appointment in the case of a recent dropped foot, significant or rapidly progressive weakness, or if gait deteriorates. New urinary or bowel issues, numbness in the saddle area or perineum, or significant neurological symptoms on both sides require urgent evaluation.
In Terrebonne, a consultation can help clarify the affected territory, document strength and sensitivity, and discuss options tailored to your situation. To track evolution, note changes in gait, areas of numbness, and movements that have become difficult: neurological function matters as much as the intensity of pain.
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 spinal pain and symptoms compatible with sciatica.
This information is educational and does not replace a consultation, diagnosis, or treatment by a licensed healthcare professional. The author is neither a physician nor a specialist in a medical specialty recognized by the Collège des médecins du Québec.
| Point to check | Clinical marker |
|---|---|
| Possible L5 territory | Side of the leg, top of the foot, or big toe. |
| Movement to observe | Lift the foot or extend the big toe. |
| Walking on heels | Difficulty may indicate weakness in dorsiflexion. |
| Another possible cause | The fibular nerve may also be involved. |
| Evaluation | Compare path, strength, sensitivity, reflexes, and gait. |
| Imaging | The MRI correlates with symptoms and examination. |
| Management | Adapt activity and reassess neurological evolution. |
| Consult promptly | New weakness, dropped foot, or deteriorating gait. |
| Emergency | Urinary or bowel disturbances, or numbness in the saddle. |
Illustrative testimonials: L5 sciatica and difficulty lifting the foot in Terrebonne
Note: The narratives below are fictional examples created for educational purposes. They do not correspond to verified patient testimonials and do not allow for a diagnosis.
“The pain descended on the side of my leg to the top of my foot.” In this example, the person also describes tingling near the big toe. This path may be compatible with irritation of the L5 root, but the symptoms must be compared with strength, sensitivity, reflexes, and gait. Nerve territories vary and can overlap.
“I sometimes tripped because my foot caught.” A new difficulty in lifting the foot or big toe deserves quick evaluation. It may suggest weakness in a territory associated with L5, but other causes, including damage to the peroneal nerve, are also possible. An examination is necessary to guide the assessment.
“The pain had decreased, but I was walking worse.” This example reminds us that a reduction in pain does not always mean that nerve function is improving. Follow-up can compare the ability to walk on heels, lift the foot, and perform usual activities, in addition to monitoring the progression of pain and numbness.
“My imaging showed a disc problem, but I wanted to know if it really explained my symptoms.” An anomaly on an MRI must be correlated with the affected side, the trajectory of symptoms, and the results of the clinical examination. An L4-L5 injury can sometimes irritate the L5 root depending on the location of the lesion, but imaging alone does not necessarily confirm the cause.
In Terrebonne, an evaluation can help clarify symptoms, check strength and sensitivity, and discuss options suitable for the observed profile. When neurology is stable, a conservative approach may include adjusted activity and gradual progression. Any option, including neurovertebral decompression, should be considered on a case-by-case basis, with no guarantee of outcome and without delaying medical evaluation when necessary.
Consult quickly if weakness appears or progresses, if the foot starts to drop, or if walking deteriorates. New urinary or intestinal issues, numbness in the saddle area, or rapid neurological deterioration require urgent medical evaluation.
Sciatica in Terrebonne: L5 pain and difficulty lifting the foot
Pain radiating down the leg, accompanied by numbness on the top of the foot or near the big toe, may indicate irritation of the L5 nerve root. Some people also notice they have more difficulty lifting the front of the foot or the big toe. These signs deserve careful evaluation: their presence alone is not sufficient to establish a diagnosis of sciatica or determine the cause.
The L5 root is frequently involved in lumbar nerve injuries. A disc herniation at L4-L5 can particularly contribute to its irritation, depending on the location of the lesion. Other causes, such as foraminal narrowing or damage to a peripheral nerve, can produce similar manifestations. The perceived area varies from person to person: the maps of dermatomes and myotomes are guides, not perfectly defined boundaries.
The difficulty in lifting the foot corresponds to a possible decrease in dorsiflexion. Weakness in the extension of the big toe may also be observed when L5 is involved. Walking on heels engages these movements and may help identify functional weakness. However, a foot that catches or drops may also be related to damage to the peroneal nerve. It is therefore important to compare multiple signs before concluding a lumbar origin.
During an evaluation in Terrebonne, the examination may focus on the trajectory of pain and tingling, sensitivity, strength of both legs, reflexes, and the quality of walking. The professional considers the evolution of symptoms and their effect on daily activities. An MRI is not necessary in all cases; it may be considered when its results are likely to change management or when neurological deficits or persistent symptoms justify it.
When neurological signs are stable, a conservative approach may include adapted activity, gradual progression of movements, and monitoring of strength and function. Motorized neurovertebral decompression may be considered for some people when the evaluation suggests a concordant discal or foraminal component. It is not indicated automatically and does not replace a medical diagnosis or appropriate referral. Available care depends on the professional, their qualifications, and their field of practice.
Priority changes if weakness appears or progresses, if the foot recently drops, or if walking deteriorates. New urinary or intestinal issues, numbness in the saddle region, significant symptoms on both sides, fever, or recent trauma require rapid or urgent medical evaluation. These signs should not wait for a routine appointment.
Sylvain Desforges, B.Sc., D.O., N.D., is an osteopath and naturopath, founding president of TAGMED clinics and ACMA association. His background particularly focuses on the management of chronic pain and the integration of technologies, including spinal decompression, laser therapy, and shockwaves, depending on the case and evaluation. The information presented is educational: it does not replace a consultation with a physician or another authorized health professional. The author is neither a physician nor a specialist in a medical specialty recognized by the Collège des médecins du Québec.
In Terrebonne, pain or numbness that follows the side of the leg to the top of the foot or the big toe may be consistent with irritation of the L5 nerve root. If difficulty lifting the foot or big toe arises, worsens, or disrupts walking, a quick evaluation is important: symptoms must be examined as a whole, and not automatically attributed to sciatica or disc herniation.
Recognizing possible signs of L5 injury
The L5 root is involved in the sensitivity of areas on the side of the leg, the top of the foot, and sometimes the big toe. Pain, tingling, or numbness in these areas can guide the evaluation, but are not sufficient to confirm the affected root. Nerve pathways overlap and vary from person to person. To better understand these differences, consult resources on L4-L5 sciatica and its possible symptoms and how the affected root can modify the pain trajectory.
A motor impairment may make dorsiflexion more difficult, which is the movement that lifts the front of the foot, or the extension of the big toe. Some people notice that the foot catches on the ground, that the toes lift less well, or that walking on heels becomes difficult. These signs require a comparison of strength on both sides and an evaluation of walking; a simple feeling of heavy leg does not necessarily correspond to a true loss of strength.
Why difficulty in lifting the foot should be evaluated
The drop foot describes a significant difficulty in raising the front of the foot. It may be related to an issue with L5, but also to a problem affecting the fibular nerve or another neurological cause. Therefore, the location cannot be determined from the symptom alone. The page of the TAGMED Clinic on sciatica and drop foot provides additional information; you can also consult these resources on drop foot associated with sciatica and on the numbness of the toes.
A relevant examination confronts the symptom trajectory with strength, sensitivity, reflexes, and functional capacities. It can notably compare the raising of the foot and the big toe, observe walking on heels, and examine other leg movements. Reflexes and sensory tests provide clues, but no single test can conclude on its own. Signs associated with L4 or S1 may also overlap; for example, the difficulty in standing on tiptoes may point to other elements of the examination, as explained in this guide on S1 and the difficulty in standing on tiptoes.
Examinations and Management Options
Imaging, notably MRI, is not systematically necessary. It is mainly considered when its result may modify the management, for example, in the presence of a motor deficit, persistent symptoms, or concerning elements. If an image is available, it must be correlated with the affected side, the relevant level, and the results of the clinical examination: a visible abnormality alone does not prove that it explains the symptoms. For a general overview, you can read the resources on pain, numbness, and possible weakness in L4-L5 as well as on the anatomy, causes, and management of sciatica.
When neurological function is stable, a conservative approach can be discussed: adapted activity, gradual progression, and rehabilitation, with checks on strength and walking. Depending on the assessment, the duration of symptoms, and the probable cause, further investigation or a specialized medical opinion may also be indicated. Motorized neurovertebral decompression can be discussed in certain selected individuals when a discal or foraminal component corresponds with the clinical picture; it is not suitable for everyone and does not replace the evaluation of weakness. To better understand the signs that warrant special attention, see also the resources on numbness and weakness related to sciatica and on nerve symptoms that should not be downplayed in Terrebonne.
When to Seek Urgent Evaluation
Do not postpone a consultation if new or progressive weakness appears, if the foot drops, catches on the ground, or if walking deteriorates. New urinary or intestinal issues, numbness in the saddle region or perineum, significant symptoms on both sides, or rapid neurological deterioration require urgent medical evaluation. In these situations, do not continue a routine care program before obtaining medical advice.
For an evaluation of symptoms consistent with sciatica in Terrebonne, the consultation can help clarify the trajectory, check motor and sensory function, discuss useful examinations, and determine suitable options. The services available and the proposed care depend on the consulted professional and their field of expertise. You will find information on the treatment of sciatica in Terrebonne and on the services of the TAGMED Clinic.
About the Author
Sylvain Desforges, B.Sc., D.O., N.D., osteopath and naturopath, is the founding president of TAGMED and the ACMA association. His practice is dedicated to chronic spinal pain, particularly lower back pain and symptoms consistent with sciatica.
Medical Disclaimer
This content is provided for educational purposes and does not replace a consultation, diagnosis, or treatment by a physician or other licensed healthcare professional. The author is neither a physician nor a specialist in a medical specialty recognized by the Collège des médecins du Québec. Osteopathy, manual medicine, or functional support approaches do not constitute medical acts and do not replace medical follow-up. In case of significant or progressive weakness, recent drop foot, urinary or intestinal issues, saddle anesthesia, fever, recent trauma, or rapid deterioration, consult a physician or emergency service. Also consult the Legal Notice.








