plantar fibromaAre you concerned about a lump or bump you’ve noticed on the bottom of your foot? If it feels firm when you touch, you very likely have a plantar fibroma.

What Is a Plantar Fibroma?   

A fibroma is a fibrous knot of tissue that can occur anywhere in the body. A plantar fibroma is a fibroma embedded in the plantar fascia found in the arch of the foot. It can develop in one or both feet.

While plantar fibromas are benign (nonmalignant), they usually will not go away without treatment. They can stay the same size, but they can also get larger over time. There is no known cause for this condition.

Symptoms of Plantar Fibroma

The lump you feel in the arch of your foot can also cause pain. While not everyone feels pain with a fibroma, if you do experience it your shoes are usually the culprit. However, you can also feel pain when walking or standing while barefoot.

Who Is At Risk?

Plantar fibromas are most common in middle age and men get them twice as often as women.

Diagnosis of Plantar Fibroma

In our office, Dr. Rion Berg will press on the lump in your foot in order to make a diagnosis. Be aware that this pressure can cause pain and can sometimes extend down to the toes. We may need to order an  MRI or perform a biopsy to confirm it.

Treatment of Plantar Fibroma

Non-surgical treatment may help relieve the pain of a plantar fibroma, although it will not make it go away. We use the following treatments in our office:

Cortisone injections

Cortisone injections can help shrink the fibroma and help relieve the pain that occurs when walking. Unfortunately, fibromas often recur and will need to be re-treated.

Custom Orthotics 

Custom orthotics may be helpful in relieving the pain by changing your weight distribution away from the fibroma.


Ultrasound therapy used in physical therapy can also be used to relieve the pain.


If non-surgical approaches don’t work, the fibroma can be removed with surgery. While this can help relieve the pain, there is a high incidence of recurrence.

To make an appointment with our podiatrist, call us at 206-368-7000 or request and appointment online.

Dr. Rion Berg
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A podiatrist in North Seattle treating families for over 40 years.