Accessory Navicular Problems

Overview

An accessory navicular is an extra bone on the inner side of your foot. It's connected to the bone we call the "navicular," which helps form the foot's arch. Most people don't have an accessory navicular, and you can have one and not know it. But in some people, this extra bone causes problems.

Causes

An accessory navicular forms as your foot bones develop. In a normal foot, it's one of two pieces that eventually fuse to form the navicular. But if these two parts don't fuse, they become two separate bones. They are connected by fibrous tissue or cartilage. An accessory navicular can cause problems in a few ways. It can be irritated by the constant pulling of a tendon that attaches in the area. It can cause a bump on your instep that can rub against your shoe. And, you can injure your foot and hurt the tissue that connects it to the navicular.

Symptoms

Accessory navicular problems are felt on the inner side of your foot. You may have an irritated, swollen bump on your skin. You may have pain or throbbing in your mid foot and arch. Your foot may hurt more when you are active.

Treatment

Treatment options depend on your needs. For some people, medications and an arch support may help provide relief from pain. A splint or cast can help an injured accessory navicular heal. If these options don't help, you may benefit from surgery. Your healthcare provider can create a plan that's right for you.

Please be aware that this information is provided to supplement the care provided by your physician. It is neither intended nor implied to be a substitute for professional medical advice. CALL YOUR HEALTHCARE PROVIDER IMMEDIATELY IF YOU THINK YOU MAY HAVE A MEDICAL EMERGENCY. Always seek the advice of your physician or other qualified health provider prior to starting any new treatment or with any questions you may have regarding a medical condition.