Morton’s Neuroma: Everything You Need to Know from a Podiatrist

The sensation of a burning, aching ball of the foot — as though a pebble is lodged in your shoe, or your sock is bunched under the ball of your foot — combined with numbness and shooting pain between the third and fourth toes is so characteristic that experienced podiatrists can often diagnose Morton’s neuroma from the patient’s description alone before any examination. It’s one of the more distinctive pain presentations in podiatry, it’s common, and it has a wide range of effective treatment options.

What Is Morton’s Neuroma?

Despite the name, Morton’s neuroma is not technically a “neuroma” (benign tumor of nerve tissue) in the traditional sense. It’s a perineural fibrosis — thickening of the fibrous tissue surrounding the common digital nerve as it passes between the metatarsal heads. The third interspace (between the third and fourth toes) is affected in approximately 80% of cases; the second interspace is the next most common.

The nerve is compressed between the metatarsal heads with each step, and over time, the repeated mechanical irritation causes the protective sheath around the nerve to thicken. This thickening then creates more impingement — a self-perpetuating cycle.

Causes and Risk Factors

• Narrow-toed or pointed shoes: Compress the metatarsal heads together, increasing interspace pressure. High heels add to this by loading the forefoot with each step.
• High-impact activities: Running, jumping — repeated impact loads the forefoot and creates repetitive nerve compression
• Foot structure: Bunions (push the first toe toward others, compressing the spaces), hammertoes, flat feet with excessive pronation
• Morton’s toe: A long second metatarsal shifts weight distribution onto the second space
• Trauma: Direct injury to the forefoot

Symptoms

Morton’s neuroma symptoms are quite distinctive:

• Burning, aching, or electric-like pain in the ball of the foot — often between the third and fourth toes
• Numbness or tingling in the adjacent toes (often the third and fourth)
• “Pebble in the shoe” or “bunched sock” sensation
• Pain that worsens with narrow shoes and high heels, improves with removing shoes and massaging the foot
• Pain that worsens with prolonged standing and high-impact activities
• Some patients hear or feel a “click” when walking (Mulder’s click)

Diagnosis

Physical Examination

The Mulder’s test is the classic examination: the examiner squeezes the metatarsal heads together from side to side while simultaneously compressing the interspace from above. A positive result produces the patient’s characteristic pain or a palpable click as the neuroma is provoked.

Diagnostic Ultrasound

Diagnostic ultrasound can directly visualize the neuroma — they appear as well-defined, hypoechoic (dark) oval masses in the interspace. Ultrasound is highly operator-dependent but provides excellent real-time assessment and can be used for guided injection. Neuromas >5mm are more consistently symptomatic.

MRI

MRI provides excellent characterization of neuroma size and location, especially for atypical presentations or when ultrasound is inconclusive. Most neuromas measure 5–15mm.

Conservative Treatment (Start Here)

Footwear Modification

The first and most impactful intervention: switch to shoes with wide toe boxes and low heels. This single change resolves symptoms in up to 30% of mild cases. High-heeled, pointed shoes must be avoided during treatment and ideally permanently.

Metatarsal Pads

A metatarsal pad placed just proximal (behind) the metatarsal heads spreads the metatarsals apart and decompresses the interspace. Properly placed pads can provide immediate relief. Fitting requires attention to placement — a pad placed on or distal to the metatarsal heads worsens symptoms.

Custom Orthotics

Custom orthotics incorporating a metatarsal pad and correcting any underlying pronation address both the neuroma symptoms and contributing biomechanical factors. For patients with recurrent or bilateral neuromas, orthotics are a long-term solution.

Corticosteroid Injections

Ultrasound-guided corticosteroid injection into the neuroma provides significant relief in 50–70% of patients. Effects typically last 3–6 months. Injections can be repeated, though repeated steroid exposure can cause fat pad atrophy and other tissue changes if overused. A series of 2–3 injections is typical before considering more definitive treatment.

Sclerosing Injections

A series of 4–7 dilute alcohol injections (sclerosing agent) causes progressive degeneration of the nerve tissue — effectively chemically “destroying” the neuroma. Reported success rates of 60–80% in studies, with durable long-term results. Less tissue disruption than surgery.

Surgical Treatment

When conservative care fails after 3–6 months, surgery is highly effective:

• Neurectomy (excision): Removal of the affected segment of the digital nerve. Success rates of 85–95%. The patient loses sensation in the web space between the affected toes permanently — a small price for resolution of symptoms.
• Nerve decompression: Release of the intermetatarsal ligament without nerve excision — preserves sensation but has somewhat lower success rates.

Recovery after neurectomy: weight-bearing in a surgical shoe immediately; return to regular shoes at 2–4 weeks; full activity at 4–6 weeks.

Related Conditions

• Morton’s Neuroma Treatment Page
• Custom Orthotics for Forefoot Pain
• Bunion Treatment

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Board-certified podiatrists Dr. Tom Biernacki, Dr. Carl Jay, and Dr. Daria Gutkin see patients daily at our Howell and Bloomfield Township, MI offices.

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Dr. Tom Biernacki, DPM

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Dr. Tom Biernacki, DPM is a double board-certified podiatrist and foot & ankle surgeon at Balance Foot & Ankle Specialists in Southeast Michigan. With over a decade of clinical experience, he specializes in heel pain, bunions, diabetic foot care, sports injuries, and minimally invasive surgery. Dr. Biernacki is a member of the APMA and ACFAS, and his patient education content on MichiganFootDoctors.com and YouTube has reached over one million views.