Differential Diagnosis for Pain in the Arch of the Foot
Single Most Likely Diagnosis
- Plantar Fasciitis: This is the most common cause of arch pain, resulting from inflammation of the plantar fascia, a band of tissue that supports the arch of the foot. It is often associated with overuse, poor foot mechanics, or inadequate footwear.
Other Likely Diagnoses
- Flat Feet (Pes Planus): A condition where the arch of the foot collapses, leading to strain on the muscles and ligaments that support the arch, causing pain.
- Overuse or Strain: Repetitive activities or sudden increases in physical activity can lead to strain on the muscles and tendons of the foot, resulting in arch pain.
- Poor Footwear: Wearing shoes that do not fit properly or do not provide adequate support can lead to arch pain.
- Morton's Neuroma: A condition where a nerve in the foot becomes irritated, often between the third and fourth toes, causing pain that can radiate to the arch.
Do Not Miss Diagnoses
- Deep Vein Thrombosis (DVT): Although less common, DVT can cause pain in the foot, including the arch, and is a medical emergency due to the risk of pulmonary embolism.
- Infection (Cellulitis or Abscess): Infections in the foot can cause severe pain, redness, and swelling, and require prompt antibiotic treatment.
- Fracture: A fracture in one of the bones of the foot can cause severe pain in the arch and requires immediate medical attention.
Rare Diagnoses
- Tarsal Tunnel Syndrome: A condition similar to carpal tunnel syndrome but affecting the nerves in the foot, causing pain, numbness, and tingling in the arch.
- Arthritis (Rheumatoid, Psoriatic, or Osteoarthritis): Various forms of arthritis can affect the joints in the foot, leading to pain in the arch.
- Baxter's Neuroma: A condition where a nerve on the bottom of the foot becomes inflamed, causing pain in the arch.
- Gout or Pseudogout: Deposits of uric acid or calcium pyrophosphate can cause sudden, severe pain in the foot, including the arch.