Finding a firm lump on the bottom of your foot can be concerning, especially when it begins to press against your shoe or cause discomfort while walking. While any new mass should be evaluated by a doctor, a plantar fibroma is a noncancerous condition that typically affects only the soft tissue in the bottom of the foot. Although it can be uncomfortable, it’s not dangerous and it doesn’t spread.
What Is a Plantar Fibroma?
A plantar fibroma is a small, benign (noncancerous) growth that develops within the plantar fascia — the thick band of tissue that runs along the bottom of your foot from the heel to the toes.
Plantar fibromas are fibrous nodes that usually form in the arch of the foot and are typically less than an inch in size. They usually appear in one foot, although it’s possible for them to show up in both. These growths are not cancerous. In rare cases where multiple or more aggressive growths develop, a related condition called plantar fibromatosis may be diagnosed.
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What Are the Symptoms of a Plantar Fibroma?
The most noticeable sign of a plantar fibroma is a firm lump in the arch of the foot. It may feel like a small marble or knot embedded under the skin.
Symptoms may include:
- A firm, well-defined mass in the arch of the foot
- Pain on the bottom of the foot, especially when wearing shoes
- A sensation like having a small stone inside your shoe
- Pressure or discomfort when standing or walking
- Visible bulging of the skin over the arch
Some people experience little to no pain, while others develop discomfort as the fibroma presses against footwear or surrounding tissue. Plantar fibromas usually stay small but can grow up to three inches or more.
What Causes a Plantar Fibroma?
You may be experiencing a corn or callus if you notice:
- A thick, rough or raised area of skin
- Hardened bumps, especially over joints or pressure points
- Tenderness or pain beneath the skin
- Dry, flaky or waxy skin over the area
Corns can be especially painful when pressed, while calluses may just feel thick or tough.
How Is a Plantar Fibroma Treated?
Treatment usually focuses on relieving symptoms instead of removing the mass, especially since plantar fibromas are not innately harmful.
Nonsurgical Treatment for Plantar Fibromas
Most cases are managed conservatively with one or more of the following:
- Over-the-counter anti-inflammatory medications
- Custom orthotics or supportive shoe inserts
- Offloading pads to reduce pressure on the lump
- Stretching exercises
- Topical medications to reduce inflammation
- Cortisone injections
- Physical therapy
These approaches aim to relieve pressure and make walking and standing more comfortable.
Plantar Fibroma Surgery
Surgical removal of a plantar fibroma is typically only considered when pain persists after conservative treatment.
Although uncommon, surgical options may include removing only the fibroma or also removing a small margin of surrounding tissue. Very rarely, a larger portion of the plantar fascia will be removed as well.
Surgery carries a risk of recurrence, and in some cases may affect arch structure. Because of this, it’s generally reserved for cases that significantly interfere with daily function.
When Should You See a Specialist?
Schedule an appointment for evaluation with us at OrthoNebraska if:
- You notice a new lump or change in your foot’s shape
- You experience new or worsening foot pain
- Walking becomes uncomfortable or difficult
Even though plantar fibromas are not cancerous, any new growth should be assessed to rule out other conditions.
What Is the Outlook for Plantar Fibromas?
Plantar fibromas are not life-threatening and do not spread. Many people manage symptoms successfully with simple, nonsurgical treatments. If the fibroma does not cause pain, you can continue your normal activities, including exercise and sports.
If symptoms develop or change, early evaluation can help you stay active and comfortable in the long term.
Treat Plantar Fibroma at OrthoNebraska
Looking for help with plantar fibroma in the Omaha area? We’re here for you. The experts at OrthoNebraska want to make sure you feel understood, safe and confident to take on the treatment plan that’s right for you.
