Metatarsalgia can be divided into different categories based on cause and location:

1. Primary Metatarsalgia: Caused by anatomical or biomechanical changes, such as foot deformities or uneven load distribution.
2. Secondary Metatarsalgia: Arises from conditions like rheumatoid arthritis, gout, or diabetes mellitus.
3. Mechanical Metatarsalgia: Caused by overuse, e.g., from prolonged standing, walking, or unsuitable footwear.
4. Neuropathic Metatarsalgia: Pain due to nerve irritations, e.g., Morton’s neuroma or peripheral neuropathies.

The main causes of metatarsalgia are varied and include:

• Mechanical overload:
  • Prolonged standing, walking, or intense sports activities excessively strain the metatarsal bones.
  • Inappropriate footwear, especially shoes with high heels or poor cushioning.
• Foot deformities:
  • Flatfoot, splayfoot, or hallux valgus alter the load distribution in the forefoot.
• Degenerative changes:
  • Age-related cartilage and tissue wear can cause pain.
• Inflammatory diseases:
  • Diseases such as rheumatoid arthritis or gout lead to inflammation in the foot area.
• Neuropathies:
  • Nerve compressions, such as Morton's neuroma, cause burning or stabbing pain.

The symptoms of metatarsalgia vary depending on the cause and severity of the condition:

- **Local pain:** Pain usually occurs under the metatarsal heads and intensifies with exertion.

- **Tenderness:** The area under the toe joints is sensitive to pressure.

- **Burning sensation:** A burning pain or numbness, especially with neuropathic causes.

- **Swelling:** Visible or palpable swelling in the forefoot area.

- **Movement restrictions:** Difficulty walking, especially on uneven ground or when walking barefoot.

- **Gait changes:** Limping or adopting protective postures to avoid pain.

The diagnosis is made through a combination of medical history, clinical examination, and imaging techniques:

• Medical history:
  • The doctor inquires about the duration, type, and intensity of the symptoms as well as possible triggers such as footwear or stress.
• Clinical examination:
  • Checking for foot deformities, tenderness, and mobility of the toes.
• Imaging techniques:
  • X-ray: Visualization of bone deformities or degenerative changes.
  • MRI: Detection of soft tissue damage or inflammation.
  • Ultrasound: Examination of nerve and tendon changes.

Conservative Therapy

In most cases, metatarsalgia can be treated without surgery:

• Orthopedic Insoles:
  • Special shoe inserts or pads to relieve the metatarsal bones.
• Physiotherapy:
  • Exercises to strengthen the foot muscles and improve mobility.
• Medication Therapy:
  • NSAIDs to relieve pain and inflammation.
• Shoe Adjustment:
  • Use of comfortable, well-cushioned shoes with flat heels.
• Cold Therapy:
  • Application of cold packs to reduce swelling and pain.

Surgical Therapy

In severe or chronic cases, surgery may be necessary:

• Osteotomy:
  • Correction of bone misalignments to improve load distribution.
• Removal of Morton Neuromas:
  • Surgical removal of painful nerve knots.
• Arthroplasty:
  • Restoration or replacement of damaged joint structures.

To prevent metatarsalgia, the following measures are recommended:

1. Wearing appropriate shoes: Shoes with good cushioning and enough space for the toes.
2. Avoiding overstrain: Regular breaks during long periods of walking or standing.
3. Strengthening the foot muscles: Exercises to improve stability and flexibility.
4. Weight reduction: Reducing the load on the forefoot through a healthy body weight.
5. Early treatment of foot deformities: Use of orthopedic insoles at the first signs of deformities.