Plantar Fasciitis is the Latin term for “inflammation of the plantar fascia”. The plantar fascia is a thick, fibrous ligament that runs under the foot from the heel bone to the toes. It forms the arch of the foot and functions as our natural shock-absorbing mechanism. Unlike muscle tissue, the plantar fascia is not very elastic and therefore is very limited in its capacity to stretch or elongate. Herein lies the problem, when too much traction is placed on the plantar fascia (for various reasons) micro-tearing will occur, resulting in irritation, inflammation and pain. Plantar Fasciitis usually causes pain under the heel. However some people may experience pain under the arch of the foot. Both heel pain and arch discomfort are related to Plantar Fasciitis, with heel pain being far more common than arch pain.
The cause of plantar fasciitis is poorly understood and is thought to likely have several contributing factors. The plantar fascia is a thick fibrous band of connective tissue that originates from the medial tubercle and anterior aspect of the heel bone. From there, the fascia extends along the sole of the foot before inserting at the base of the toes, and supports the arch of the foot. Originally, plantar fasciitis was believed to be an inflammatory condition of the plantar fascia. However, within the last decade, studies have observed microscopic anatomical changes indicating that plantar fasciitis is actually due to a non-inflammatory structural breakdown of the plantar fascia rather than an inflammatory process. Due to this shift in thought about the underlying mechanisms in plantar fasciitis, many in the academic community have stated the condition should be renamed plantar fasciosis. The structural breakdown of the plantar fascia is believed to be the result of repetitive microtrauma (small tears). Microscopic examination of the plantar fascia often shows myxomatous degeneration, connective tissue calcium deposits, and disorganized collagen fibers. Disruptions in the plantar fascia’s normal mechanical movement during standing and walking (known as the Windlass mechanism) are thought to contribute to the development of plantar fasciitis by placing excess strain on the calcaneal tuberosity.
Most people with plantar fasciitis have pain when they take their first steps after they get out of bed or sit for a long time. You may have less stiffness and pain after you take a few steps. But your foot may hurt more as the day goes on. It may hurt the most when you climb stairs or after you stand for a long time. If you have foot pain at night, you may have a different problem, such as arthritis, or a nerve problem such as tarsal tunnel syndrome.
Your GP or podiatrist (a healthcare professional who specialises in foot care) may be able to diagnose the cause of your heel pain by asking about your symptoms and examining your heel and foot. You will usually only need further tests if you have additional symptoms that suggest the cause of your heel pain is not inflammation, such as numbness or a tingling sensation in your foot, this could be a sign of nerve damage in your feet and legs (peripheral neuropathy) your foot feels hot and you have a high temperature (fever) of 38C (100.4F) or above – these could be signs of a bone infection, you have stiffness and swelling in your heel, this could be a sign of arthritis. Possible further tests may include blood tests, X-rays – where small doses of radiation are used to detect problems with your bones and tissues, a magnetic resonance imaging (MRI) scan or ultrasound scan, which are more detailed scans.
Non Surgical Treatment
If conservative treatments fail, and the symptoms of plantar fasciitis have not been relieved, the doctor may recommend one of the following treatments. Cortisone, or corticosteroids, is medications that reduce inflammation. Cortisone is usually mixed with local anesthetics and injected into the plantar fascia where it attaches to the heel bone. In many cases this reduces the inflammation present and allows the plantar fascia to begin healing. Local injections of corticosteroids may provide temporary or permanent relief. Recurrence of symptoms may be lessened by combining steroid injections with other forms of treatment such as orthotics, changes in shoe gear, weight loss, stretching exercises, and rest. Repeated cortisone injections may result in rupture of the plantar fascia, thinning of the heel’s fat pad, and other tissue changes. Extracorporeal Shock Wave Therapy (ESWT) devices generate pulses of high-pressure sound that travel through the skin. For reasons that are not fully understood, soft tissue and bone that are subjected to these pulses of high-pressure energy heal back stronger. There is both a high-energy and low-energy form of ESWT; and both forms of shock wave therapy can be used in the treatment of plantar fasciitis. Research studies indicate ESWT is a safe and effective treatment option for plantar fasciitis. The recovery period is shorter than traditional invasive surgery and the procedure eliminates many of the risks associated with traditional surgery.
Surgery is not a common treatment for this condition. Approximately 5% of people with plantar fasciitis require surgery if non-surgical methods do not help to relieve pain within a year. The surgical procedure involves making an incision in the plantar fascia in order to decrease the tension of the ligament. Potential risks of this surgical procedure include irritation of the nerves around the heel, continued plantar fasciitis, heel or foot pain, infection, flattening of the arch, problems relating to the anesthetic.
Plantar fasciitis can be a nagging problem, which gets worse and more difficult to treat the longer it’s present. To prevent plantar fasciitis, run on soft surfaces, keep mileage increases to less than 10 percent per week, and visit a specialty running shop to make sure you’re wearing the proper shoes for your foot type and gait. It’s also important to stretch the plantar fascia and Achilles tendon.