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Metatarsalgia

Details:

Metatarsalgia is a generic term used to describe non-specific forefoot pain in the region of the metatarsal bones.  Most clinicians agree that metatarsalgia is actually pain from the metatarsal bones that is the result of overuse, overloading or use of inappropriate shoes for a particular activity.  Metatarsalgia may be considered a precursor to a stress fracture of the metatarsal bones.  The 'algia' or pain of the metatarsal bones is a symptom of stress or fatigue of the bone.  Therefore, if we consider metatarsalgia to be an overuse syndrome, cases of metatarsalgia that fail to repair themselves over time may result in a stress fracture of the metatarsal bone.

Treatment of metatarsalgia

Metatarsalgia can be due to a number of different biomechanical conditions of the foot.  And in many cases, the footRocker_sole_shoe is simply predisposed to developing metatarsalgia.  Luckily, the conservative treatment of many forefoot problems is the same. Metatarsalgia can be treated with a metatarsal pad, arch support with metatarsal pad, increased cushion of the forefoot  in the shoe. Forefoot rockers soles (seen at right) are an important shoe modification used by pedorthists to decrease the load to the forefoot.  And lastly, stiffening the shank of the shoe tends to carry load more effectively past the metatarsal bones to the ball of the foot.  Stiff shank shoes and boots are helpful, or a stiff carbon graphite inner sole called a spring plate, can help.

Oral and injectable anti-inflammatories, such as cortisone, can be helpful in cases of metatarsalgia.  But it's important  to recognize that metatarsalgia is a mechanical problem.  It's a problem that occurs again and again with each step.  Anti-inflammatories may help to decrease pain, but they don't specifically target the primary mechanical problem contributing to the pain of metatarsalgia.  Therefore, effective treatment of metatarsalgia must focus on correcting the pathomechanics of the foot.


Nomenclature:

algia - suffix relating to the pain or ache of an area.

metatarsal - one of five bones found in each foot.

pathomechanics - problem or condition that is cause by 'pathological' or bad mechanics.


Anatomy:

Foot_bonesThere are five metatarsal bones in each foot that run from the midfoot (arch) to the metatarsal phalangeal joints (toe joints). Each metatarsal is a long shaft with cartilage on both ends to form articulation with the midfoot and toes.

The size of the metatarsals vary. The first metatarsal is always larger and more stout. The lesser four metatarsals are typically close in size. Any increase in metatarsal size may be suggestive of an increase in the long term load bearing of the individual metatarsal bone.


Biomechanics:

Metatarsal_declination_angle_imageThe metatarsal bones reach the ground at a 20-30 degree angle as they travel from the midfoot to the toes. The overall length of the metatarsal is very important in diagnosing cases of metatarsalgia related to one or two isolated metatarsals.

Metatarsal_parabolaWhen viewing an AP X-ray (from the top of the foot to the bottom) the overall length of the metatarsals is referred to as the metatarsal parabola. The typical parabola is 2,1,3,4,5 meaning that the length of the metatarsals is the second as longest, the first and third as a close second and the fourth and fifth close behind. To understand the importance of metatarsal length, or parabola, consider this simple example;

Let's say you have two bamboo poles, one 5 feet in length and the other 10 feet in length. You hold the poles under your arms level to the earth and slowly lower them. Obviously the ten foot pole is going to hit the ground before the five foot pole. This is exactly what happens with long metatarsals, over and over again with each step. Eventually, metatarsalgia develops as a result of the over loading of the 'ten foot' pole.

Much of the treatment of the biomechanical factors found in metatarsalgia relate to correcting the imbalance of the metatarsal length.


Symptoms:

Metatarsalgia
The symptoms of metatarsalgia can be acute or chronic in nature. Symptoms may include dull ache and sharp pain on the bottom of the foot. Typically, symptoms of metatarsalgia increase with the amount of time spent on the feet and are relieved by rest. The picture to the right shows the area most commonly effected by metatarsalgia. Symptoms may vary in severity and location

Differential Diagnosis:

Arthritis

Bursitis

Callus

Capsulitis

Morton's neuroma

Stress fracture


Products Recommended for Metatarsalgia:

See Also:

References:

This article was written by Jeffrey A. Oster, DPM and last updated 1/24/08. Additional references include;

Albert, S. F. Soft tissue causes of metatarsalgia. Clin Podiatri. Med. Surg. 7(4):579-595, 1990

Chairman, E.L. Restoration of the plantar fat pad with autolipotransplantation. J. Foot Ankle Surg. 33:373-379, 1994

Scranton P. Metatarsalgia; Diagnosis and Treatment. J of Bone and Joint Surg Am. July 1980;62(5):723-732

McPoil T, Management of Metatarsalgia Secondary to Biomechanical Disorders. Physical Therapy. June 1986;66(6):970-972

Stapleton B. Primer on Rheumatic Diseases. 9th ed. Atlanta Ga: Byrd Press; 1988

Viladot A. Metatarsalgia Due to Biomechanical Alterations of the Forefoot. Orthop Cl of N. Am. Jan 1973;4(1):165-178

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At the conclusion of this article you'll find a number of products that are recommended by Myfootshop.com to treat this condition. These products have been hand picked by the medical consulting staff at Myfootshop.com for their effectiveness and reliability. Should you have any questions regarding the selection or use of these products please don't hesitate to contact us at mailto:sales@myfootshop.com or join us in the product support topic of The Foot Talk Forum.

The information on this page does not constitute the practice of medicine and is offered as an educational aid.  Should you have a medical problem, Myfootshop.com and their representatives recommend that you seek the help of your physician or other healthcare professional.

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