What Is a Morton’s Neuroma? Symptoms and Treatment

Morton’s neuroma is a painful thickening of nerve tissue in the ball of your foot, most often between the third and fourth toes. Despite its name, it is not actually a tumor. The condition involves fibrosis around a digital nerve, caused by repeated pressure or irritation, and it can make even ordinary walking feel like you’re stepping on something sharp. Understanding what drives the pain and what works to relieve it matters because the condition is common, frequently misdiagnosed, and responds very differently to treatment depending on when you catch it and how large the lesion has grown.

Not Really a Neuroma

The word “neuroma” suggests a nerve tumor, but what’s actually happening in Morton’s neuroma is thickening and scarring (fibrosis) of the tissue surrounding a plantar digital nerve in the forefoot. Repeated compression or irritation causes this fibrotic buildup over time, and the result is a swollen, painful segment of nerve, almost always in the second or third intermetatarsal space (the gap between the long bones behind your toes).¹ The third web space, between your third and fourth toes, is by far the most commonly affected.

Why that particular spot? Several factors converge there. The third and fourth metatarsal bones have more motion between them than other metatarsals. A strong band of connective tissue called the deep transverse metatarsal ligament crosses over the nerve in this area. And the nerve itself can be tethered in the third web space in a way that makes it vulnerable to getting pinched between the metatarsal heads during walking.² Older anatomy textbooks blamed the ligament directly, but research has shown that the neuroma tends to sit farther forward than the ligament, between the metatarsal head and the toe joint, suggesting the story is more about repetitive compression during push-off than about the ligament acting as a vice.³

Who Gets It and Why

Morton’s neuroma is more common in women than men, and footwear is the most frequently cited modifiable risk factor. Narrow, pointed shoes and high heels concentrate weight on the ball of the foot and squeeze the metatarsal heads together, multiplying the mechanical stress on the nerve.² Activities that put repeated pressure on the forefoot, such as running, court sports, or ballet, can also contribute.

Foot shape plays a role, too, though not always in the way you’d expect. Researchers have looked at whether flat feet (pes planus) or high-arched feet (pes cavus) predispose people to the condition. One study found that people with high arches who developed Morton’s neuroma showed changes in how long they spent in different phases of their stride, spending less time in stance and more in swing, suggesting they were subtly offloading the forefoot. People with flat feet and the neuroma, on the other hand, did not show these gait shifts.⁴ The takeaway is that foot type alone doesn’t determine risk, but it may influence how your body compensates once the problem starts.

What It Feels Like

The classic description is a feeling of walking on a pebble or a bunched-up sock, sometimes accompanied by burning pain that radiates into the toes. Numbness or tingling in the adjacent toes is also common. Symptoms tend to worsen with tight shoes and prolonged standing or walking, and they often ease when you take your shoe off and rub the ball of your foot. In clinical studies, pain was the primary reason people sought help, and it frequently led to reduced walking distance and changes in footwear choices.⁵

That said, not everyone fits the textbook picture. The “pebble” sensation and burning pain, while widely taught, are less reliable as diagnostic markers than you might think. A systematic review of diagnostic accuracy found that the “walking on a pebble” complaint was present in only about half of confirmed cases, and “burning pain” was similarly inconsistent.⁶ Many people describe a more diffuse ache or vague discomfort in the forefoot without the dramatic pebble sensation. If your foot pain doesn’t match the classic description, that doesn’t rule out a neuroma.

Getting Diagnosed

Diagnosis usually starts with a hands-on exam. Your clinician will press and squeeze the forefoot in specific ways to reproduce your symptoms. Of the various manual tests, the “thumb index finger squeeze” test, where the examiner presses the affected web space from top and bottom while squeezing the metatarsal heads together, has been found to be the most sensitive screening maneuver, with a sensitivity around 96% in one comparative study.⁷ Another well-known test is Mulder’s click, where lateral compression of the forefoot produces an audible or palpable “click” as the neuroma pops between the metatarsal heads. This test is less sensitive overall, but when it’s positive, it tends to correlate with larger neuromas.⁷

When the clinical picture is unclear, imaging can help. Both ultrasound and MRI are used, and a meta-analysis found them to be roughly equally sensitive, each detecting around 90% of neuromas.⁸ MRI has a slight edge in specificity, meaning it’s a bit better at ruling out conditions that mimic a neuroma. Ultrasound has the advantage of being cheaper, faster, and available in the office, and it allows the clinician to press on the area in real time to correlate the image with your symptoms. Individual study results vary more than the pooled numbers suggest; one smaller study reported ultrasound sensitivity as low as about 57%, while MRI hit around 83%.⁹ The practical lesson is that a negative ultrasound doesn’t completely rule out a neuroma if your symptoms are convincing.

Conditions That Look Like Morton’s Neuroma

One of the trickier aspects of forefoot pain is that several conditions share overlapping symptoms. Plantar plate injuries, where the tough ligament on the underside of a toe joint partially tears, can cause pain in the same area and even look similar on imaging. Because both conditions involve the ball of the foot and can cause pain during push-off, telling them apart matters for choosing the right treatment.¹⁰ An MRI study found that plantar plate tears in the second toe joint were frequently accompanied by soft-tissue changes in the adjacent intermetatarsal space, such as thickening or small fluid collections, that could be mistaken for a neuroma on a quick read.¹¹

Other mimics include stress fractures of a metatarsal, bursitis between the metatarsal heads, capsulitis (inflammation of a toe joint capsule), and even referred pain from conditions higher up the kinetic chain. If initial treatment isn’t helping, revisiting the diagnosis is worth the effort.

Conservative Treatment

Most clinicians start with non-surgical approaches, and for smaller neuromas caught early, that’s often enough. The mainstays are wider shoes with a low heel, a metatarsal pad placed just behind the metatarsal heads to spread them apart and reduce pressure on the nerve, and sometimes a custom insole with arch support. A review of orthotics research found that insoles with a retrocapital pad (positioned just proximal to the metatarsal heads) can relieve pain by shifting pressure away from the nerve.¹²

There’s a window, though. That same review identified a threshold of roughly four and a half months: beyond that duration, and in neuromas larger than about 5 to 6 millimeters, orthotics and shoe changes tended to become more of a coping strategy than a real fix.¹² If you’ve been wearing better shoes and using a metatarsal pad for several months without meaningful improvement, it’s probably time to escalate.

Corticosteroid Injections

A steroid injection into the intermetatarsal space is often the next step. It delivers a powerful anti-inflammatory directly around the irritated nerve and can offer significant short-term relief, with maximal pain reduction typically seen between one week and three months after the injection.¹³ Some people get lasting benefit; others see the pain return. A systematic review found that about 30% of patients who received corticosteroid injections eventually went on to surgery because the pain persisted.¹³

How the injection is delivered matters. Research comparing ultrasound-guided injections to “blind” injections (placed by feel alone) found that guided injections provided better long-term pain relief and less disability over up to three years of follow-up, with more than 75% of patients experiencing sustained improvement.¹⁴ If you’re offered a corticosteroid injection, asking whether it can be done under ultrasound guidance is a reasonable question.

Side effects are generally mild. Skin depigmentation at the injection site occurred in a small percentage of patients, and fat pad atrophy, thinning of the cushion under the ball of the foot, was reported rarely. No major complications such as infection or tendon rupture were documented in the systematic review.¹³

Radiofrequency Ablation and Other Emerging Options

For people who want something more definitive than a steroid injection but aren’t ready for surgery, radiofrequency ablation has become an increasingly studied option. The procedure uses a needle-like probe, guided by ultrasound, to deliver targeted heat to the nerve. One study reported that average pain scores dropped from 9 out of 10 before treatment to 2 out of 10 at one year, with improved quality-of-life scores and no complications.¹⁵ A broader systematic review reported roughly 89% patient satisfaction with radiofrequency ablation over an average follow-up of about two years.¹⁶

Other approaches that have shown some promise in early research include cryoablation (freezing the nerve), extracorporeal shockwave therapy, and sclerosing alcohol injections. A systematic review noted that several of these therapies produced statistically significant improvements, but all had limitations in terms of study quality or the number of patients treated.¹⁷ These are options worth discussing with your clinician if steroid injections haven’t worked and you’d like to try something less invasive than open surgery, but the evidence base is still maturing.

When Surgery Is on the Table

Surgery is generally reserved for neuromas that haven’t responded to conservative measures. The two main surgical approaches are neurectomy (excising the affected segment of nerve) and decompression (releasing the ligament overlying the nerve without removing it). Both are performed through a small incision on the top of the foot.

For larger neuromas, excision tends to outperform decompression. A comparative study found that when the neuroma exceeded about 7.4 mm in width, open excision yielded lower pain scores, higher functional scores, and greater patient satisfaction than percutaneous ligament release alone.¹⁸ For smaller neuromas, ligament release can be effective and preserves the nerve, which means you keep sensation in the affected toes.

The reported success rate for primary neurectomy is about 74%, meaning roughly three-quarters of patients get good relief after the first surgery.¹⁹ That’s a solid number, but it also means about one in four patients is left with continued or recurring symptoms. After neurectomy, you will lose some sensation between the affected toes, which most people tolerate well but some find bothersome.

Recurrence After Surgery

Recurring pain after neurectomy is one of the more frustrating problems in forefoot surgery. It can result from a stump neuroma forming on the cut end of the nerve, from incomplete excision of the original lesion, or occasionally from an adjacent nerve developing its own neuroma. Revision surgery is an option, though the outcomes are less predictable than the first operation. Studies on revision neurectomy have found that about 75% to 78% of patients report substantial pain improvement afterward, but fewer than half achieve complete pain relief.²⁰ Newer techniques, such as wrapping the cut nerve end in a collagen conduit to prevent stump neuroma formation, are being investigated to improve these numbers.

The Anatomy Behind the Third Web Space

A long-standing explanation for why the third intermetatarsal space is the most frequently affected is that the nerve there receives branches from both the medial and lateral plantar nerves, making it thicker and more vulnerable. The reality is more nuanced. Cadaver studies have consistently found that a communicating branch between these two nerves is present in only about a quarter to a third of feet, not in everyone.²¹ One early study did find enlarged communicating branches in some specimens and suggested they might predispose to neuroma formation.²² But a separate cadaver study found that the nerve to the third web space was not actually thicker in feet that had this communication, and the incidence of neuroma in the third web space was no higher in feet with the branch than in feet without it.²³

So the popular “thicker nerve” explanation doesn’t hold up well. The third web space’s vulnerability is more likely about its biomechanical environment: greater metatarsal mobility, the geometry of the metatarsal heads, and its position at a transition point in the foot’s arch. This is one of those areas where the textbook answer is still catching up to the anatomical evidence.

Living With the Condition Long-Term

For many people, Morton’s neuroma becomes a manageable nuisance rather than a life-altering problem. Switching to shoes with a wider toe box and using an inexpensive metatarsal pad can be enough to keep symptoms at bay, especially if the neuroma is small. Clinical studies have documented that pain from Morton’s neuroma leads to reduced walking distances, avoidance of certain shoes, and decreased participation in exercise, all of which can chip away at quality of life over time if unaddressed.⁵ The condition is benign, not dangerous, but chronic forefoot pain that limits how much you move has downstream effects on fitness and mood that are worth taking seriously.²⁴

The encouraging part is that treatment options span a wide range, from a $10 metatarsal pad to ultrasound-guided injections to minimally invasive ablation to surgery. The condition doesn’t have a single best treatment because the right approach depends heavily on how large the neuroma is, how long you’ve had symptoms, and what kind of activity level you want to maintain. Getting an accurate diagnosis early and giving conservative measures a real trial, ideally within that roughly four-and-a-half-month window before orthotics lose their effectiveness, gives you the best chance of avoiding the operating room entirely.

A Condition Named for the Wrong Reasons

The name itself carries some historical baggage. Thomas George Morton, an American surgeon during the Civil War era, was not the first to describe the condition. An Italian anatomist named Filippo Civinini provided the first anatomical description of the nerve lesion, and a British podiatrist named Lewis Durlacher, who treated the King’s feet, was the first to recognize it as a nerve problem and treat it with pressure-relieving footwear.²⁵ Morton’s contribution was recognizing the cause of the pain more precisely and proposing surgical excision as a solution. In some European literature, you’ll see the condition called “Civinini-Morton syndrome,” a small nod to the anatomist who got there first but lost the naming contest. Given that the condition is neither Morton’s alone nor a true neuroma, the name is doubly misleading, but it’s the one that stuck.