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Morton's Neuroma (Foot)

Introduction

Morton’s Neuroma is a painful foot condition.  It occurs when a nerve near the toes becomes compressed and inflamed.  If diagnosed early, many cases of Morton’s Neuroma can be treated without surgery.  However, surgery for the condition has a high success rate.
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Anatomy

In medical terms, your toes are called digits.  They are numbered one through five.  The big toe is the first digit, and your toes are numbered up to the fifth digit, your little toe.  Nerves travel through your foot to your toes to control movement and sensation. 

Morton’s Neuroma develops between the third and fourth digit of the foot.  This is an area where two nerves join together and become thicker.  A ligament (deep transverse metatarsal ligament) between the bones covers the nerve.  Symptoms occur when the nerve is compressed between the ligament and the bottom of the foot.
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Causes

The exact cause of Morton’s Neuroma is unknown.  It results when the tissue surrounding the nerve between the third and fourth toes thickens, swells, and puts pressure on the nerve.  Inflammation develops because of pressure, injury, and irritation.

People with bunions, flat feet, and hammertoe are susceptible to developing Morton’s Neuroma.  Pressure from standing, walking, jumping and running or wearing high heeled, pointed toe, or tight-fitting shoes can contribute to the condition.  High impact sports, such as racquetball, squash, or tennis, can lead to Morton’s Neuroma.
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Symptoms

Morton’s Neuroma can cause sharp pain, tingling, numbness, stinging, and burning between the third and fourth toe and ball of the foot.  It may feel as if a lump is inside the ball of your foot or that you have stepped on something.  Your symptoms may be worse when you stand, walk, or put weight on your foot.  Symptoms typically start gradually, come and go, and become worse over time. 
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Diagnosis

You should contact your podiatrist if you have the symptoms of Morton’s Neuroma.  Early treatment can help prevent future surgery.  Your doctor can diagnose Morton’s Neuroma by reviewing your medical history, examining your foot, and taking xrays. 
 
As part of the examination, your podiatrist will hold your foot in a specific position to try to produce a clicking noise (Mulder’s Sign) that is associated with Morton’s Neuroma.  X-rays will be used to rule out other conditions, such as a fracture or arthritis.  A magnetic resonance imaging (MRI) scan may be used to learn more about the size and location of the neuroma. 
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Treatment

There are a variety of treatments for mild to moderate Morton’s Neuroma.  The treatment you receive will depend on the severity of your symptoms.  Rest, wearing appropriate shoes, and over-the-counter pain medications, such as ibuprofen, can help reduce swelling and pain.  Padding or shoe orthotics can help reduce pressure.

If conservative treatments do not provide relief, your podiatrist may inject your foot.  Corticosteroid medication is used to reduce pain and inflammation.  Alcohol sclerosing injections are used to harden the nerve area and relieve pain.
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Surgery

Surgery may be recommended when symptoms persist and other treatments do not provide symptom relief.  There are surgical options for Morton’s Neuroma: Release surgery and removal surgery.  Release surgery involves making an incision on the top of the foot to access the deep transverse metatarsal ligament that covers the nerve.  By making an incision in the ligament, the pressure is released from the nerve.


Removal surgery is performed through the bottom of the foot.  The neuroma is easier to access this way.  The neuroma is surgically removed, and the incision is closed with stitches. 
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Recovery

Recovery from surgery depends on the procedure that you received.  Because release surgery is performed from the top of the foot, there are no stitches on the bottom of the foot and walking may be resumed soon after the procedure.  Removal surgery uses stitches on the bottom of the foot, so you will need to use crutches for a short time if you received this procedure.  No matter what surgical or nonsurgical treatment  you receive, healing is an individualized process, and your podiatrist will let you know what to expect.
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Prevention

Contact your podiatrist if you suspect that you have Morton’s Neuroma.  Early diagnosis and treatment can prevent future surgery.  You may help prevent Morton’s Neuroma by modifying your activities to reduce high-pressure repetitive forces to your feet.  Wearing low heel shoes with wide toe boxes, padding, and orthotics as recommended by your doctor can all help.

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This information is intended for educational and informational purposes only. It should not be used in place of an individual consultation or examination or replace the advice of your health care professional and should not be relied upon to determine diagnosis or course of treatment.

The iHealthSpot patient education library was written collaboratively by the iHealthSpot editorial team which includes Senior Medical Authors Dr. Mary Car-Blanchard, OTD/OTR/L and Valerie K. Clark, and the following editorial advisors: Steve Meadows, MD, Ernie F. Soto, DDS, Ronald J. Glatzer, MD, Jonathan Rosenberg, MD, Christopher M. Nolte, MD, David Applebaum, MD, Jonathan M. Tarrash, MD, and Paula Soto, RN/BSN. This content complies with the HONcode standard for trustworthy health information. The library commenced development on September 1, 2005 with the latest update/addition on February 16, 2022. For information on iHealthSpot’s other services including medical website design, visit www.iHealthSpot.com.

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