I have an extra bone in my foot!? Is that normal?

I have an extra bone in my foot!? Is that normal?

It is not usually until you have to have an x-ray that you may find you have an extra bone in your skeletal make-up of your feet.  Although sometimes you may notice that your foot has a mysterious bump that other friends and family do not have.

Do not freak out!!! Breathe!  It is a normal variation!

Accessory bones or Ossicles of the foot are a normal variation that can present as both symptomatic and asymptomatic.  There are normally only 26 bones in each foot and an extra bone can mean the foot shape can vary from the average making it difficult to accommodate the extra bone in footwear.  This can cause rubbing and therefore irritation of the extra bone or structure that it is sitting within e.g. a tendon.  

Another reason pain can occur is if the bone potential gets in the way functionally.  For example there is an accessory bone (Os Trigonum) that can occur at the back of the ankle joint and when the foot/ankle is maximally pointed, such as in activities such as en pointe in ballet or kicking in football, it can “get in the way”, impinge and cause pain.

Below are examples of accessory bones of the foot:

Os peroneum – occurs on the lateral part of the foot area of the cuboid bone.  It sits within the peroneus longus tendon and is quite common occurring in up 26% of feet (Jones).

Os tibiale externum – also known as Os naviculare accessorium is usually a large accessory ossicle that presents on the medial side of the navicular bone of the foot.  The tibialis tendon will often insert into the ossicle and in some people can cause a tendinosis due to the traction of the navicular and the ossicle.  It is present in approximately 10% of the population (Jones).

Os trigonum –  This accessory bone sits posterior to the talus bone and can sometimes be mistaken for a fracture.  It occurs in approximately 7% of adults (Jones).  The ossicle usually develops between the ages of 7 and 13 and usually fuses with the talus, otherwise continuing as an Os trigonum (Jones).

Bipartite hallux Sesamoid – is a normal variant that can occur in up 33% of hallux sesamoids (Jones).  It is more common in the medial sesamoid than the lateral sesamoid and an important differential diagnoses is a stress fracture of the sesamoid bone (Jones).  This can be difficult to differentiate because bipartite hallux sesamoids are more likely to fracture than complete hallux sesamoids (Jones) .

Os supranavicular – is located on the dorsal (top) aspect of the foot above the navicular bone or talonavicular joint.  It is present in less than 1% of the population (Jones).

If there are any further questions in regards to accessory bones please contact me via email

To book with Aleks please contact us or simply call Burleigh Physio on 5535 5218


Jones, Jeremy. “Os Trigonum | Radiology Reference Article | Radiopaedia.Org”. Radiopaedia.org. N.p., 2017. Web. 22 Mar. 2017.

Gold Coast Physiotherapy and Allied Health at Burleigh Heads and Broadbeach 


Our Response to Covid-19

This page is up to date to our best knowledge, however, this is a rapidly evolving situation so we apologise for any potential delay in updating this information.

We want to reassure all our patients that we are following stringent infection control procedures in our clinic, and screen all people coming into the clinic, to exclude any patients that have any signs or symptoms consistent with Covid-19, as well as screening any patients that should be in isolation ie recently returned from overseas, or have been advised to isolate due to recent exposure with a known Covid-19 patient.

All our staff have now completed the Department of Health Covid-19 Infection Control Training.

What are we doing to minimise risk?

  • Screening patients for risk factors over the phone or through text messages before they attend appointments. Those with risk factors or symptoms are advised not to attend & to seek medical advice.
  • Hand sanitiser station at the front of the building must be used before you enter.
  • Following stringent infection control measures within the clinic. This includes
    • Disinfecting all beds, door handles, EFTPOS machine before and after each patient use.
    • Linen changed between each patient and commonly touched surfaces through the practice are cleaned regularly throughout the day.
    • Minimising the distances between clients in the waiting room- some chairs are outside undercover.
  • We have advised our team members not to come to work if they have cold or flu-like symptoms.
  • We are following all Department of Health recommendations for our type of business.

On the 30th March 2020 – the Australian government issued a statement that “People aged over 70, aged over 60 with pre-existing conditions, or Indigenous people aged over 50 should stay home wherever possible for their own protection.”

The decision to come in for physiotherapy treatment really is an individual one – if you feel that your treatment is medically necessary, and are comfortable with the risks of leaving your home and coming to physiotherapy, then rest assured that when you attend our physiotherapy clinic, we are following our strict infection control processes and doing everything we can to minimise your risk whilst in our care. However, we completely understand if you are not comfortable with coming in for treatment.

TELEHealth Consultations

We are offering telehealth consults and home visits (where suitable) for patients who cannot attend our clinic.

Read more about TELEhealth Consultations here.

Staying Healthy

  • Wash your hands often (and for 20 seconds) with soap and water
  • Cough into your elbow or use a tissue to cover your mouth when you cough or sneeze
  • Social distancing practices – Avoiding close contact with others, such as touching, including shaking hands
  • Limit contact with people who are sick, and stay home if you are sick and encourage employees to stay home when sick
  • Get 7-8 hours’ sleep a night to help your immune system stay strong
Please stay safe and take care of each other!

We are monitoring the situation very closely and will make adjustments to our business as we are further informed. Our priority is the health & well being of our patients and our staff. Thanks for your understanding.

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