Morton neuromas can be classified according to their location and progression:

1. Single neuromas: Affect only one foot, usually between the third and fourth metatarsal bones.
2. Multiple neuromas: Affect several nerves in the same or both feet.
3. Early stage: Pain occurs only with pressure or stress, without lasting symptoms.
4. Chronic stage: Pain and numbness persist even at rest, accompanied by a permanent foreign body sensation.

The causes of Morton neuromas are varied and include:

• Mechanical stress:
  • Tight footwear and high heels increase pressure on the forefoot and irritate the nerves.
• Foot deformities:
  • Flatfoot, splayfoot, or high arches lead to improper loading of the forefoot.
• Sport-related overuse:
  • Running and jumping sports increase the load on the midfoot area.
• Traumatic injuries:
  • Bruises or repeated micro-injuries can irritate the nerves.
• Inflammatory processes:
  • Local inflammation in the forefoot area can contribute to the formation of a Morton neuroma.

The symptoms of a Morton neuroma are characteristic and primarily affect the forefoot area:

- **Stabbing pain:** Especially between the third and fourth toes, often described as "burning" or "electrifying."

- **Numbness:** Sensory disturbances or tingling in the toes.

- **Foreign body sensation:** Feeling as if there is a small stone in the shoe.

- **Increased discomfort under load:** Pain increases with prolonged standing, walking, or wearing tight shoes.

- **Relief through shoe change:** Walking barefoot or wearing wide shoes alleviates the discomfort.

The diagnosis is based on a thorough medical history, clinical examinations, and supplementary imaging techniques:

• Medical History:
  • The doctor inquires about typical symptoms such as pain location, type of footwear, and load habits.
• Clinical Examination:
  • Palpation of the forefoot with pressure on the affected area to provoke pain.
  • Mulder's sign: Increased pain by compressing the forefoot laterally.
• Imaging Techniques:
  • Ultrasound: Visualization of thickenings or inflammations in the nerve tissue.
  • MRI: Precise imaging of the neuroma and exclusion of other causes such as tumors or cysts.

Conservative Therapy

Most Morton neuromas can be treated with non-operative measures:

• Shoe adjustment:
  • Wearing comfortable, wide shoes with flat heels and good cushioning.
• Orthopedic insoles:
  • Special insoles for pressure relief and arch support.
• Physiotherapy:
  • Exercises to strengthen the foot muscles and improve mobility.
• Medication therapy:
  • Taking NSAIDs for pain relief and anti-inflammation.
• Injections:
  • Cortisone or anesthetic injections to relieve acute symptoms.

Surgical Therapy

If conservative measures are not sufficient, a surgical procedure may be necessary:

• Excision of the neuroma:
  • Removal of the thickened nerve tissue, often with long-lasting symptom relief.
• Decompression:
  • Expansion of the midfoot area by releasing constricting structures.

The following measures are helpful in preventing a Morton’s neuroma:

1. Avoiding tight shoes: Comfortable, flat shoes with enough room for the toes.
2. Changing shoes: Regularly wearing different types of shoes to relieve the foot.
3. Orthopedic support: Using insoles to stabilize the foot in case of misalignments.
4. Regular exercise: Promoting foot health through joint-friendly sports like swimming or yoga.
5. Weight reduction: Avoiding overweight to reduce the load on the forefoot.