Morton’s Neuroma

Morton’s neuroma (interdigital neuroma) develops when the common digital nerve in the forefoot, especially between the 3rd and 4th toes (less commonly between the 2nd and 3rd toes), is repeatedly compressed under the transverse intermetatarsal ligament. This continuous pressure leads to nerve thickening over time. Typical symptoms include burning, stabbing pain, numbness, and the sensation of “walking on a pebble” in the ball of the foot and toes. Walking, prolonged standing, and wearing narrow or high-heeled shoes usually make the symptoms worse. Diagnosis is most often made with a careful physical examination.

Morton’s neuroma is seen nine times more frequently in women than in men. A typical scenario is a woman forced to take off her shoes in the middle of the street due to sudden pain — often caused by Morton’s neuroma.

In the early stages, wide toe-box shoes, metatarsal pads, and ultrasound-guided corticosteroid injections are preferred as non-surgical treatment options. However, in patients who do not respond to these conservative methods, surgical treatment may be required.

What Is Morton’s Neuroma?

Morton’s neuroma is a nerve entrapment syndrome (neuropathy) caused by repeated compression of the common digital nerve at the level of the metatarsal heads, beneath the transverse intermetatarsal ligament. Although it is most commonly seen between the 3rd and 4th toes, Morton’s neuroma can occur in any intermetatarsal space.

Patients usually describe burning, tingling, or sharp pain in the forefoot and affected toes while walking or standing for long periods. Narrow or high-heeled shoes worsen the symptoms, while foot deformities such as flatfoot (pes planus) or high arch (pes cavus) increase the risk.

What Are the Symptoms of Morton’s Neuroma?

Morton’s neuroma symptoms vary from person to person but typically include:

1. Pain

• Burning or stabbing pain at the level of the metatarsal heads.
• Pain often radiates into the toes. Patients frequently describe it as “walking barefoot on a stone.”
• Pain decreases with rest and worsens with activity. It becomes more pronounced after wearing narrow or high-heeled shoes, long walks, or running.
• Patients often feel relief after removing their shoes.
• Night pain is uncommon.

2. Numbness and Tingling

• Numbness, tingling, or an electric shock-like sensation may occur in the affected toes.
• Some patients cannot clearly describe it as numbness but rather as a disturbing or abnormal sensation in the forefoot and toes.

Who Is Most at Risk for Morton’s Neuroma?

Morton’s neuroma is more common in individuals with certain risk factors:

1. Female Gender

• About 90% of cases are women (female-to-male ratio 9:1).
• The main reason is the use of high-heeled and narrow toe-box shoes, which concentrate body weight on the forefoot and compress the nerve.

2. Flatfoot (Pes Planus)

• Loss of the natural foot arch alters weight distribution.
• This increases pressure on the intermetatarsal space and predisposes to neuroma formation.

3. Hallux Valgus (Bunion)

• Deviation of the big toe toward the smaller toes narrows the intermetatarsal space.
• This mechanical effect increases the likelihood of developing Morton’s neuroma.

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How Is Morton’s Neuroma Diagnosed?

Diagnosis is usually made through a detailed history and physical examination.

• Physical Examination: When the intermetatarsal space is squeezed, the thickened nerve may feel like a palpable mass. This compression reproduces the burning and stabbing pain radiating into the toes. This finding is known as Mulder’s sign.
• Imaging:
  • Magnetic Resonance Imaging (MRI): Can visualize nerve thickening and neuroma.
  • Ultrasound (USG): Useful for detecting neuroma location during dynamic assessment and for guiding injections.
• Some patients may present with multiple neuromas in the same foot.

How Is Morton’s Neuroma Treated?

Non-Surgical Treatment

1. Shoe Modification

Narrow, high-heeled, and stiff-soled shoes aggravate Morton’s neuroma. The first step in treatment is switching to wide toe-box, cushioned shoes. If the condition is diagnosed early and the patient adapts quickly, reducing nerve compression may reverse the damage and prevent recurrence.

2. Orthotics

Custom-made metatarsal pads or insoles are designed to reduce pressure on the compressed nerve. However, they are not always easy to use; some patients may need to switch to larger shoes for comfort.

3. Ultrasound-Guided Corticosteroid Injection

Corticosteroid injections performed under ultrasound guidance reduce inflammation around the compressed nerve, relieving pain and numbness.

• Most patients experience significant improvement after a single injection.
• Some may require a second injection.
• If two injections fail to provide relief, repeated injections are not recommended.

Surgical Treatment

In patients whose symptoms persist despite non-surgical management, surgery for Morton’s neuroma is considered. During surgery, the thickened nerve tissue is excised. The success rate is high, but not every patient requires surgical intervention.

What Happens If Morton’s Neuroma Is Not Treated?

If left untreated, Morton’s neuroma progresses and symptoms gradually worsen. Pain and discomfort increase, making daily activities difficult. Long-standing untreated cases may lead to difficulty walking and permanent nerve damage, resulting in continuous numbness, burning, and pain in the toes.

Early diagnosis and treatment are crucial to prevent long-term complications.

Condition	Outcome
Chronic pain	Makes daily activities difficult
Restricted mobility	Negatively affects work and social life
Need for surgery	Becomes inevitable in advanced stages

Early diagnosis and proper management are the most effective ways to prevent long-term complications.

Which Patients Should Have Surgery for Morton’s Neuroma?

Surgery is recommended only when non-surgical methods fail to provide significant relief. Patients who continue to have symptoms despite wearing wide toe-box shoes, using metatarsal pads, and undergoing ultrasound-guided corticosteroid injections may require surgery.

Clinical studies show that approximately 80% of Morton’s neuroma patients improve with non-surgical treatment, while only 20% require surgical intervention. Postoperative patient satisfaction is high, with success rates exceeding 85%.

How Is Morton’s Neuroma Surgery Performed?

The goal of surgical treatment is to relieve pressure on the entrapped nerve.

• The transverse intermetatarsal ligament is released to decompress the nerve.
• If the nerve tissue shows significant thickening or mass formation, this segment is also excised.
• The procedure is usually performed through a small 2–3 cm incision on the top of the foot.

Following surgery, most patients experience significant relief of pain and numbness. Patient satisfaction is high and long-term results are favorable. In cases where conservative methods fail, surgery should not be delayed.

Recovery After Morton’s Neuroma Surgery

• First 10–14 days: The incision heals. Showering is possible with waterproof dressings.
• First week: Patients are advised to avoid full weight-bearing; most weight should be placed on the heel while walking.
• Weeks 2–3: Light exercises can be initiated. Athletes may return to low-intensity training.
• Week 6: Full return to sports is usually possible.

Morton’s Neuroma Exercises

Specific exercises can help reduce pressure on the forefoot, strengthen foot muscles, and relieve stress on the nerve. These exercises do not replace treatment but can be used as supportive measures alongside non-surgical therapies.

1. Toe Stretching Exercises

• Pressing toes together: Push the toes toward each other and hold for 10 seconds. Repeat several times throughout the day.
• Toe spreading: Spread the toes as wide as possible and hold for 10 seconds. Repeat regularly to improve flexibility.

2. Foot Strengthening Exercises

• Heel raises: Stand and slowly lift the heels off the ground, balancing on the toes for 5 seconds, then lower slowly. Perform 10–15 repetitions daily.
• Towel scrunches: Place a towel on the floor and use the toes to grip and pull it toward you. Repeat 5–10 times for each foot.

3. Ankle Stretching Exercises

• Circular movements: While seated, lift the foot off the ground and rotate the ankle in circular motions. Perform 10 repetitions in each direction.
• Dorsiflexion and plantar flexion: Move the ankle upward (dorsiflexion) and downward (plantar flexion). Perform 10 repetitions for each movement.

Why Do Toes Go Numb? – The Link with Morton’s Neuroma

Numbness in the toes is usually a nerve-related problem. One of the most common causes is Morton’s neuroma, a condition caused by nerve compression.

Morton’s neuroma develops when the common digital nerve between the 3rd and 4th toes becomes compressed between the metatarsal bones under the transverse intermetatarsal ligament. This compression causes thickening of the nerve and leads to symptoms such as numbness, tingling, burning, and electric shock-like sensations.

Symptoms of Numbness Due to Morton’s Neuroma

• Numbness between the 3rd and 4th toes while walking or standing for long periods
• Sensation of a folded sock or shoe under the ball of the foot
• Tingling or electric shock radiating into the toes
• Symptoms worsening with tight or high-heeled shoes
• Temporary relief after removing shoes

Frequently Asked Questions About Morton’s Neuroma

Conclusion

Morton’s neuroma is a painful nerve entrapment in the forefoot that causes burning, numbness, and tingling in the toes. Diagnosis is usually made with a careful physical examination.

First-line treatments include wide toe-box shoes, orthotics, and ultrasound-guided corticosteroid injections. For patients who do not respond to conservative care, surgery provides a permanent and effective solution.

With early diagnosis and proper treatment, most patients with Morton’s neuroma experience significant improvement in quality of life within a short period of time.