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Overview
Pes planus is the scientific term that describes low arch or "flat" feet. As podiatric physicians, we are very interested not only in structure but also in function of the feet. While very few people have 20-20 vision, it is also true that very few people have perfect arch structure. High and low arch feet are just the two ends of the spectrum of foot structure. The more deviation from what is considered perfect, the worse the function becomes. We describe deviation from "the ideal" as imbalance in structure. It is the imbalance in structure that leads to abnormal function. Abnormal function causes pain and/or deformity. Deformity can manifest itself in a variety of foot problems such as bunions or hammertoes. Likewise, pain can manifest itself in a variety of ways such as heel pain ( plantar fasciitis or heel spur), corns or calluses, metatarsalgia or pain in the ball of the foot ( neuromas, stress fractures, or tendonitis), or even in pediatric problems. Invariably, we can treat most foot imbalance or biomechanical insufficiencies with orthotic therapy.


Causes
Arch pain can be caused by several different factors. Tight calf muscles combined with repeated arch collapse on weight bearing, is the most common cause of arch pain.This can then often lead to a condition called plantar fasciitis, which is an inflammation of the connective tissue that connects the heel with the ball of the foot. When the connective tissue in the bottom of the feet gets stretched out too much, plantar fasciitis can result. The inflammation resulting from plantar fasciitis can result in arch pain. Arch pain caused by plantar fasciitis is often worst after long periods of rest, like when you first wake up in the morning. This is because the plantar fascia tightens when you are off your feet. When you wake up in the morning and start walking around, the plantar fascia stretches out again.

Symptoms
Pain and tenderness associated with plantar fascia strains are usually felt on the bottom of the foot and may manifest either as a specific or general area of tenderness. Plantar fascia pain may be increased or decreased by stretching of the arch. Generally, in mild cases of plantar fasciitis, the pain will decrease as the soft tissues of the foot "warm up"; however, pain may increase as use of the foot increases. In more severe cases of plantar fasciitis, pain may increase when the arch is stressed. A more specific pain (point tenderness) is an indicator that something is wrong in that specific area. Pain with movement of the affected area is also an indicator of the particular body part affected.

Diagnosis
In people with flat feet, the instep of the foot comes in contact with the ground when standing. To diagnose the problem, the health care provider will ask you to stand on your toes. If an arch forms,the flat foot is called flexible. You will not need any more tests or treatment. If the arch does not form with toe-standing (called rigid flat feet), or if there is pain, other tests may be needed, including a CT scan to look at the bones in the foot. MRI scan to look at the tendons in the foot. X-ray of the foot.

Non Surgical Treatment
Changes in shoes to include more supportive sport shoes or walking shoes that have a softer footbed. Oral anti-inflammatories including over-the-counter medications such as Brufen can help acute flare ups. Prescription strength anti-inflammatories prescribed by your GP or doctor. Prescription Transdermal Verapamil gel, which can reduce scar tissue. Anti-inflammatory injections (cortisone-type medications) into the mass and surrounding areas to decrease the inflammation. Stretching exercises, this may worsen the problem as it stretches the area of tear. Massage including tennis ball orfrozen water bottle massage of the arch - as with stretching this may worsen the problem. Taping or strapping of the foot, arch or ankle to reduce the pressure on the plantar fascia. Long term conservative treatment should include custom moulded functional orthotics. The orthotics should have an accommodation for the plantar fibroma, this is probably the best conservative treatment for plantar fibroma.


Surgical Treatment
The procedure involves cutting and shifting the bone, and then performing a tendon transfer. First, the surgeon performs a calcaneal osteotomy, cutting the heel bone and shifting it into the correct position. Second, the surgeon transfers the tendon. Reroute the flexor digitorum to replace the troublesome posterior tibial tendon. Finally, the surgeon typically performs one or more fine-tuning procedures that address the patient?s specific foot deformity. Often, the surgeon will lengthen the Achilles tendon because it is common for the mispositioned foot to cause the Achilles to tighten. Occasionally, to increase the arch, the surgeon performs another osteotomy of one of the bones of the midfoot. Occasionally, to point the foot in a straightforward direction, the surgeon performs another osteotomy of the outside portion of the calcaneus.


Prevention
Stretch and strengthen important muscles in your feet, ankles and legs in order to guard against future strain. Make sure to acquire suitable arch supports and inserts if necessary, and that your shoes are shock absorbent and in good condition. Wearing tattered shoes provides no protection, and runners should replace their footwear before exceeding 500 miles of usage. Athletes new to arch supports should gradually build their training routine, allowing their feet to become accustomed to a new stance.