The Plantar Fascia is a broad, thick band of tissue that runs from under the heel to the front of the foot. Through overuse the fascia can become inflamed and painful at its attachment to the heel bone or calcaneus. The condition is traditionally thought to be inflammation, however this is now believed to be incorrect due to the absence of inflammatory cells within the fascia. The cause of pain is thought to be degeneration of the collagen fibres close to the attachment to the heel bone.
Plantar fasciitis can develop when your feet roll in too far as you take each step. This rolling in, known as over-pronation, can happen for many reasons. It can be due to excessive weight gain, pregnancy, quickly increasing physical activity, tight calf muscles, poor biomechanics or merely wearing unsupportive, flat footwear. When your feet over-pronate, your arches can collapse, putting strain on the tissues in the bottom of your foot.
The main symptom of plantar fasciitis is heel pain when you walk. You may also feel pain when you stand and possibly even when you are resting. This pain typically occurs first thing in the morning after you get out of bed, when your foot is placed flat on the floor. The pain occurs because you are stretching the plantar fascia. The pain usually lessens with more walking, but you may have it again after periods of rest. You may feel no pain when you are sleeping because the position of your feet during rest allows the fascia to shorten and relax.
Plantar fasciitis is one of many conditions causing "heel pain". Some other possible causes include nerve compression either in the foot or in the back, stress fracture of the calcaneus, and loss of the fatty tissue pad under the heel. Plantar fasciitis can be distinguished from these and other conditions based on a history and examination done by a physician. It should be noted that heel spurs are often inappropriately thought to be the sole cause of heel pain. In fact, heel spurs are common and are nothing more than the bone's response to traction or pulling-type forces from the plantar fascia and other muscles in the foot where they attach to the heel bone. They are commonly present in patients without pain, and frequently absent from those who have pain. It is the rare patient who has a truly enlarged and problematic spur requiring surgery.
Non Surgical Treatment
Orthotics are corrective foot devices. They are not the same as soft, spongy, rubber footbeds, gel heel cups etc. Gel and rubber footbeds may cushion the heels and feet, but they do not provide any biomechanical correction. In fact, gel can do the opposite and make an incorrect walking pattern even more unstable! Orthotic insoles work by supporting the arches while re-aligning the ankles and lower legs. Most people’s arches look quite normal when sitting or even standing. However, when putting weight on the foot the arches lower, placing added tension on the plantar fascia, leading to inflammation at the heel bone. Orthotics support the arches, which reduces the tension and overwork of the plantar fascia, allowing the inflamed tissue to heal. Orthotics needn’t be expensive, custom-made devices. A comprehensive Heel Pain study by the American Orthopaedic Foot and Ankle Society found that by wearing standard orthotics and doing a number of daily exercises, 95% of patients experienced substantial, lasting relief from their heel pain symptoms.
In cases that do not respond to any conservative treatment, surgical release of the plantar fascia may be considered. Plantar fasciotomy may be performed using open, endoscopic or radiofrequency lesioning techniques. Overall, the success rate of surgical release is 70 to 90 percent in patients with plantar fasciitis. Potential risk factors include flattening of the longitudinal arch and heel hypoesthesia as well as the potential complications associated with rupture of the plantar fascia and complications related to anesthesia.
You can help to prevent plantar fasciitis by maintaining a healthy weight, by warming up before participating in sports and by wearing shoes that support the arch and cushion the heel. In people who are prone to episodes of plantar fasciitis, exercises that stretch the heel cord (known as the Achilles tendon) and the plantar fascia may help to prevent plantar fasciitis from returning. Ice massage also can be used on the bottom of the foot after stressful athletic activities. It is possible that strict control of blood sugar will prevent plantar fasciitis in people with diabetes, although this has not been proven.