Protrusion of the paravicular bone is commonly caused by the following: 1. It is caused by congenital developmental abnormalities and is commonly seen in children, because in carrying the progressively normal navicular bone endometrium in childhood, sometimes there is an extra bone, which is called the paravicular bone. If there is an obvious protrusion of the paravicular bone, it can be relieved by orthopedic insoles or orthotics. If the protrusion of the pars plana does not affect the normal development of the child or does not have any symptoms, no special treatment can be done, but when choosing shoes for the child, attention must be paid to the looseness of the shoes to avoid repeated friction between the protruding part and the shoes, resulting in inflammation or local soft tissue damage. 2, chronic strain due to trauma or tendon inflammation, which leads to hyperplasia of the pars plana or soft tissue hyperplasia and inflammation resulting in pars plana protrusion. The protrusion of the navicular bone, for this case on the one hand, the application of anti-inflammatory and analgesic drugs to control the local inflammatory symptoms. At the same time, orthopedic insoles or orthoses should be applied to avoid further protrusion of the navicular bone, while for more serious symptoms, the protruding navicular bone can be treated by surgical excision or orthopedic surgery.