Accessory navicular bone may cause a continuous stretch and stress on the tibialis posterior tendon which can progress to chronic disabling pain and may cause tendon rupture or secondary flat foot deformity; when this occurs this condition is commonly known as accessory navicular syndrome.

[4] Other conditions which closely mimic the symptoms of an accessory navicular bone include plantar fasciitis, bunions and heel spurs.

If there is ongoing pain or inflammation, an MRI or other advanced imaging tests may be used to further evaluate the condition.

[5][citation needed] Aside from surgery, there are a few options for handling an accessory navicular bone that has become symptomatic.

Medication involves usage of nonsteroidal anti-inflammatory drugs, or steroids (taken orally or injected) to decrease inflammation.