Morton's Neuroma: The Pebble in the Shoe Feeling

You are walking through a mall or standing in a kitchen, and the ball of your foot starts to burn. It feels like a fold in your sock, or a small stone under the front of your foot. You take the shoe off and rub the forefoot. Within a minute the burning settles. You put the shoe back on and it builds again.

Some people also notice that two of their toes feel different from the rest. Not painful, just a little dead. Often it is the third and fourth toes, and the pain can shoot forward into them in a sharp electrical way when the foot is squeezed sideways.

That combination has a common cause and a name that is technically wrong. The nerve running between the metatarsal heads gets compressed and thickened, and it sends burning and numbness into the toes it supplies. The label most people know is Morton's neuroma. Clinicians increasingly call it interdigital nerve compression, because the tissue change is a response to pressure rather than a tumour.

What the symptom pattern usually means

The nerve sits between the long bones of the forefoot, running forward toward the toes. The third space, between the third and fourth metatarsal heads, is affected most often. According to the StatPearls chapter on Morton neuroma, that space is narrower than its neighbours, and the nerve there receives branches from both the medial and lateral plantar nerves, which makes it thicker and more vulnerable to compression.

The classic presentation is plantar pain between the metatarsal heads, made worse by walking or by tight or high-heeled shoes, and relieved by rest or by taking the shoe off. People describe burning, stabbing, or tingling, sometimes with electric sensations running into the toes.

One detail is worth knowing before you decide what your own foot is telling you. The same chapter notes that numbness and altered sensation between the toes are present in less than half of patients, so the absence of numbness does not rule the condition out.

Two features narrow it down more than the rest. Relief on removing the shoe matters because side-to-side compression is a large part of the mechanism, so a foot that settles within a minute of being freed is telling you something. Pain that travels toward the toes fits a nerve, while pain travelling back toward the arch or heel points somewhere else.

How the classic tests actually perform

Most descriptions lean on two things: the "walking on a pebble" feeling and Mulder's click, a palpable clunk when the forefoot is squeezed side to side while the web space is pressed. A 2024 systematic review in Foot and Ankle Orthopaedics by Pitcher and colleagues tested how well those features hold up, and the results are humbling. The "walking on a pebble" description had a sensitivity of 43 to 53% and a specificity of 52%. Burning pain had a sensitivity of 54 to 57% and a specificity of 48%. The review concluded that neither of these subjective features may be considered useful on its own. Mulder's sign ranged from 29 to 94% sensitivity and 17 to 100% specificity across the included studies, and the review graded the evidence for it as weak.

Two findings did hold up:

A patient reporting clicking had a specificity of 0.96 and a positive likelihood ratio of 13.14, which the review described as strong evidence to rule the condition in.

The modified web space tenderness test, sometimes called the thumb and index squeeze, had a sensitivity of 0.96 and a negative likelihood ratio of 0.04, described as strong evidence to rule the condition out when negative.

In a real assessment, no single question or test settles it. A therapist builds the picture from where the tenderness sits, what provokes and relieves it, how the toes feel, and what the other candidates would have looked like. When the answer changes the plan, imaging is arranged through your physician.

Telling it apart from the other three causes of forefoot pain

Forefoot pain has several common sources, and they overlap enough that people treat the wrong one for months.

Metatarsalgia is a description rather than a diagnosis. It means pain under the metatarsal heads, usually because the forefoot is taking more pressure than it currently tolerates. The tenderness sits directly under the bone ends rather than in the soft space between them, and it aches rather than burning.

A metatarsal stress fracture is the one you do not want to miss. A 2024 review in the Journal of Clinical Orthopaedics and Trauma by Paavana and colleagues reports that metatarsal fractures are the most common stress fractures of the foot, accounting for 38% of all stress fractures in athletes, with the second through fourth metatarsals most frequent in runners. The presentation is vague midfoot pain that worsens with activity, with tenderness on the bone itself along its length rather than in the web space.

Timing matters too. A stress fracture usually follows a jump in training or standing hours over the preceding weeks. If your pain arrived after you added distance, changed surface, or started a job on concrete, treat that as a reason to be assessed rather than a reason to push through. The same review notes that plain X-rays frequently miss early fractures, so a negative X-ray early on does not clear you.

A plantar plate injury affects the thick ligament under the base of the toe. A 2025 narrative review in Diagnostics by Park and colleagues describes the second toe as most commonly affected, with pain on the plantar side of that joint, made worse by walking barefoot or by bending the toe upward. The review draws the line with Morton's neuroma directly: neuroma pain is neuritic and sits in the web space, while plantar plate injury gives plantar tenderness over the joint itself plus instability when the toe is moved up and down. The drawer test, where the toe is lifted and lowered against a held metatarsal head, showed a sensitivity of 80.6% and a specificity of 99.8%. Some people also notice the toe starting to drift or lift off the ground.

The short version before an appointment: burning between the toes points at the nerve, tenderness on the bone points at bone, tenderness under the toe joint with a toe that is changing position points at the plantar plate, and a general ache under the ball of the foot after more standing than usual points at load.

The footwear and load factors that drive it

Two mechanical factors squeeze that nerve, and both are addressable.

Width and toe box shape. A shoe narrower than your foot pushes the metatarsal heads toward each other and closes the space the nerve occupies. Many people wear a shoe too narrow for years without noticing, because the length is correct and length is what everyone checks.

Heel height. Raising the heel shifts weight forward onto the forefoot and holds the toes in extension, which drags the nerve forward and compresses it further. The StatPearls chapter lists tight-fitting and high-heeled shoes as the classic aggravators, and a wide, soft-soled, laced shoe with a low heel as the first-line recommendation.

Load matters alongside the shoe. Standing hours, walking volume, running mileage, and hard flooring all raise the number of compression cycles that nerve absorbs in a week. A nurse, a teacher, and a warehouse worker all present with this for the same underlying reason.

One practical test: trace your bare foot on paper while standing, then stand the shoe on the tracing. If your forefoot outline spills past the shoe outline, the shoe is narrower than the foot it contains, whatever the label says.

What conservative care actually looks like, honestly stated

Here is where a clinician should say the uncomfortable part out loud.

A 2019 systematic review and meta-analysis in the Journal of Foot and Ankle Research by Matthews and colleagues pooled the non-surgical trials. Two studies examined properly fitted footwear with a wide toe box, a low heel, and metatarsal pads. Combined, that approach succeeded in 32% of participants at an average follow-up of 4.5 months. In the same review, the odds of success following corticosteroid injection were 6 times greater than the odds of success from footwear and padding. The overall conclusion was that some evidence exists for pain reduction following corticosteroid injection or manipulation and mobilisation, and that no high-quality evidence currently exists to say which should be the first or second line non-surgical treatment.

So 32% is the honest figure for the conservative starting point. That is a reason to start with the cheapest interventions rather than the most expensive.

What a physiotherapy plan usually contains:

Footwear change first, because it costs the least and addresses the mechanism. Wider forefoot, low heel, a sole that does not force the toes into extension. This is often the single change that produces the most relief.

Metatarsal padding, placed carefully. The StatPearls chapter describes the pad sitting just behind the metatarsal heads, which spreads them apart and relieves mechanical pressure. Position is the whole trick. A pad under the heads rather than behind them increases compression instead of easing it, which is why self-placed pads often fail.

Load management. Reducing the weekly volume of the aggravating activity, breaking up long standing blocks, and changing surfaces where possible.

Foot and calf strength. Calf capacity affects how the forefoot is loaded at push-off, and intrinsic foot strength affects how the toes contribute. Slower work with a longer payoff, and the part most people skip.

Manual therapy. The 2019 review found one randomised trial showing favourable effects from manipulation and mobilisation at six weeks, aimed at reducing stiffness in the tissue around the nerve.

The same load principles govern other foot problems. The staged approach in our post on the first 6 weeks of plantar fasciitis and the load logic in why shin splints keep coming back both transfer to the forefoot.

Where orthotics fit, stated plainly

Orthotics are often the first thing someone is sold for this, and the evidence does not support treating them as the answer.

The footwear-and-padding arm in the 2019 review reached 32% success. A device can redistribute pressure away from the compressed space, and where it works, it works because of the pad position and the pressure change rather than because the device is bespoke.

The practical position: try the cheap version first. An off-the-shelf insole with a metatarsal dome, placed by someone who checks the position against your foot, tests the same idea as a custom device for a fraction of the cost. If a pressure change helps, you learn that in a few weeks. If it does not, you have not spent several hundred dollars finding out. The wider argument about when custom devices earn their price is in our post on custom orthotics and what a foot assessment should cover.

Be cautious about any assessment that ends in a device recommendation before anyone has looked at your shoes, asked about your standing hours, or checked where the tenderness sits.

When injection and surgery enter the picture

These are physician decisions. A physiotherapist does not inject and does not operate, and the role here is recognising when conservative care has had a fair trial and saying so.

Corticosteroid injection comes up when symptoms persist despite footwear and load changes. The StatPearls chapter describes good short-term relief lasting 3 to 6 months, and notes the injection is less effective for lesions greater than 8 mm. Reported adverse effects in the 2019 review included loss of skin pigment on the top of the foot and thinning of the plantar fat pad at three months after injection. The fat pad point matters, because that padding is doing useful work under the ball of the foot.

Surgery is a later step for symptoms that resist everything else. The StatPearls chapter reports neurectomy, which removes the affected nerve segment, at 75 to 85% success, with expected permanent numbness in the toes that nerve supplies and a 10 to 20% long-term recurrence rate. Recovery is described as 2 to 4 weeks to normal shoes and 8 to 12 weeks to full recovery. Decompression releases the tissue around the nerve without removing it, and is described as an alternative with less numbness afterward.

The chapter also notes that lesions of 5 to 6 mm and under tend to respond well to conservative care, while those over 8 mm more often go to surgery. That is one reason ultrasound imaging is sometimes arranged before a decision.

What to expect at a first visit

A first physiotherapy assessment for forefoot pain spends most of its time establishing which structure is involved, because the four candidates above are treated differently.

Your therapist will ask where the pain sits, whether it burns or aches, whether it travels toward the toes, whether any toes feel numb, how fast it settles when the shoe comes off, and what changed in your standing, walking, or training beforehand. Bring the shoes you actually wear, including work shoes. They carry more information than most people expect.

The examination covers where the tenderness sits, whether squeezing the forefoot from the sides reproduces the pain, the web space squeeze test, bone tenderness along each metatarsal, and stability at the toe joints. Expect them to watch you walk and look at how your foot loads at push-off.

Physiotherapy is a direct-access profession in British Columbia, regulated by the College of Health and Care Professionals of BC, so you can book an assessment without a physician's referral. Some extended-health plans require a referral for reimbursement, so check with your insurer before your first visit.

Expect the first plan to be short: a footwear change, a padding trial with the position checked, a reduction in the aggravating load, and two or three exercises. Expect it to be revised, because what your foot does over the first three to four weeks is the useful information.

When to see a physician instead

Book with your physician rather than waiting on physiotherapy if your forefoot pain followed a sudden increase in running, walking, or standing and is tender directly on the bone, because an early stress fracture can look normal on X-ray and still need a period of protected loading.

See your physician promptly for forefoot pain with swelling, redness, and warmth, for pain that wakes you at night regardless of position, for numbness spreading across the foot rather than sitting in two toes, and for any new foot symptom if you have diabetes, since reduced sensation changes both the risk and the assessment. A toe that is visibly drifting sideways or lifting off the ground also warrants a medical opinion.

This article is general information, not personal medical advice. A regulated practitioner can confirm whether the patterns described apply to you.

Frequently asked questions

What does Morton's neuroma feel like?

Most people describe burning or stabbing pain between the metatarsal heads, with a sensation like a fold in the sock or a small stone under the ball of the foot. Walking and tight or high-heeled shoes make it worse, and removing the shoe eases it. Numbness between the toes appears in less than half of patients, so its absence does not rule the condition out.

Which toes does Morton's neuroma affect?

The third web space, between the third and fourth toes, is affected most often. The StatPearls chapter explains why: that space is narrower than its neighbours, and the nerve there receives branches from both the medial and lateral plantar nerves, which makes it thicker and easier to compress between the bones.

Is a Morton's neuroma an actual neuroma?

No. The name is historical. The tissue change is a thickening of the nerve and its surrounding tissue in response to repeated compression, rather than a tumour. Many clinicians now prefer interdigital nerve compression, which describes what is happening.

How is it told apart from metatarsalgia?

Location and quality of pain do most of the work. Metatarsalgia describes aching under the metatarsal heads, with tenderness directly on the bone ends, usually from more load than the forefoot tolerates. Nerve compression burns, sits in the soft space between the bones, and often sends sensation forward into the toes. A clinician also checks bone tenderness and toe joint stability, because a stress fracture and a plantar plate injury can look similar from the outside.

Could it be a stress fracture instead?

It can, and that is the one to rule out first if your pain followed a jump in running, walking, or standing. A 2024 review in the Journal of Clinical Orthopaedics and Trauma reports metatarsal fractures as the most common stress fractures of the foot, accounting for 38% of all stress fractures in athletes, with the second to fourth metatarsals most frequent in runners. Tenderness on the bone rather than between the bones is the clue, and early X-rays often look normal, so a negative scan on the day does not clear you.

Do the classic tests actually work?

Less well than their reputation suggests. A 2024 systematic review in Foot and Ankle Orthopaedics found the "walking on a pebble" description had 43 to 53% sensitivity and 52% specificity, and burning pain had 54 to 57% and 48%, concluding neither feature is useful on its own. Two findings held up: a patient reporting clicking had 96% specificity and rules the condition in, and a negative modified web space tenderness test had 96% sensitivity and rules it out.

What shoes should I wear?

The StatPearls chapter recommends a wide, soft-soled, laced shoe with a low heel. Width across the forefoot matters most, because side-to-side compression drives the problem. A useful check at home: trace your bare foot on paper while standing, then stand the shoe on the tracing. If your forefoot outline spills past the shoe outline, the shoe is narrower than your foot.

Do metatarsal pads help?

They help some people, and placement decides the outcome. The pad sits just behind the metatarsal heads, which spreads the bones apart and takes pressure off the compressed space. A pad placed under the heads instead can make symptoms worse. In a 2019 review in the Journal of Foot and Ankle Research, footwear plus padding succeeded in 32% of participants at an average 4.5-month follow-up.

Do I need custom orthotics?

Probably not as a first step. Footwear and padding reached 32% success in the 2019 review, and the benefit comes from the pressure change and the pad position rather than from the device being custom-made. An off-the-shelf insole with a metatarsal dome, with the position checked against your foot, tests the same idea for far less money.

When is an injection or surgery considered?

Injection comes up when symptoms persist after a fair trial of footwear change, padding, and load management. The StatPearls chapter describes corticosteroid injection giving good short-term relief for 3 to 6 months, with less effect for lesions over 8 mm, and possible loss of skin pigment or thinning of the plantar fat pad. Surgery is later still: neurectomy is reported at 75 to 85% success, with expected permanent numbness in the affected toes and a 10 to 20% recurrence rate. Both are decisions for a physician or surgeon.

How long does it take to settle?

That depends on how long symptoms have been present, how large the lesion is, how much compression your daily footwear applies, and how much standing or walking your week requires. Someone who changes shoes early and reduces load often improves within weeks. Someone with years of symptoms and a lesion over 8 mm may need a different pathway. Your therapist will set expectations after assessing your foot rather than from a general timeline.

Do I need a referral to see a physiotherapist in BC?

No. Physiotherapy is a direct-access profession in British Columbia, regulated by the College of Health and Care Professionals of BC, so you can book an assessment without a physician's referral and without a confirmed diagnosis. Some extended-health insurance plans require a referral for reimbursement even though the profession does not, so confirm with your insurer before your first visit.

Sources

• Matthews et al., "The effectiveness of non-surgical interventions for common plantar digital compressive neuropathy (Morton's neuroma): a systematic review and meta-analysis," Journal of Foot and Ankle Research, 2019
• Pitcher et al., "Diagnostic Accuracy of Subjective Features and Physical Examination Tests for Morton Neuroma: A Systematic Review," Foot and Ankle Orthopaedics, 2024
• Park, Seok and Park, "Diagnosing Plantar Plate Injuries: A Narrative Review of Clinical and Imaging Approaches," Diagnostics, 2025
• Paavana, Rammohan and Hariharan, "Stress fractures of the foot: current evidence on management," Journal of Clinical Orthopaedics and Trauma, 2024
• Munir, Exume and Tafti, "Morton Neuroma," StatPearls, NCBI Bookshelf
• College of Health and Care Professionals of BC, physiotherapist scope of practice