Plantar fasciitis is thickening of the plantar fascia, a band of tissue running underneath the sole of the foot. The thickening can be due to recent damage or injury, or can be because of an accumulation of smaller injuries over the years. Plantar fasciitis can be painful.
Repeated small injuries to the fascia (with or without inflammation) are thought to be the cause of plantar fasciitis. The injury is usually near to where the plantar fascia attaches to your heel bone. You are more likely to injure your plantar fascia in certain situations. For example, if you are on your feet for a lot of the time, or if you do lots of walking, running, standing, etc, when you are not used to it. (Plantar fasciitis may be confused with ‘Policeman’s heel’, but they are different. Policeman’s heel is plantar calcaneal bursitis – inflammation of the sack of fluid (bursa) under the heel bone. This is not as common as plantar fasciitis.) Also, people with a sedentary lifestyle are more prone to plantar fasciitis. If you have recently started exercising on a different surface, for example, running on the road instead of a track. If you have been wearing shoes with poor cushioning or poor arch support. If you are overweight this will put extra strain on your heel. If there is overuse or sudden stretching of your sole. For example, athletes who increase running intensity or distance; poor technique starting ‘off the blocks’, etc. If you have a tight Achilles tendon (the big tendon at the bottom of your calf muscles above your heel). This can affect your ability to flex your ankle and make you more likely to damage your plantar fascia. Often there is no apparent cause for plantar fasciitis, particularly in older people. A common wrong belief is that the pain is due to a bony growth or ‘spur’ coming from the heel bone (calcaneum). Many people have a bony spur of the heel bone but not everyone with this gets plantar fasciitis.
The classic sign of plantar fasciitis is that the worst pain occurs with the first few steps in the morning, but not every patient will have this symptom. Patients often notice pain at the beginning of activity that lessens or resolves as they warm up. The pain may also occur with prolonged standing and is sometimes accompanied by stiffness. In more severe cases, the pain will also worsen toward the end of the day.
The health care provider will perform a physical exam. This may show tenderness on the bottom of your foot, flat feet or high arches, mild foot swelling or redness, stiffness or tightness of the arch in the bottom of your foot. X-rays may be taken to rule out other problems.
Non Surgical Treatment
Sometimes physical therapy modalities are helpful. The most frequently used modalities include ultrasound (high frequency sound vibrations that create a deep heat and reduce inflammation) and galvanic electrical stimulation ( a carefully applied intermittent muscular stimulation to the heel and calf that helps reduce pain and relax muscle spasm, which is a contributing factor to the pain). This treatment has been found most effective when given twice a week. Repeated taping and padding is sometimes used. The felt pads that will be strapped to your feet will compress after a few days and must be reapplied. While wearing them they should be kept dry, but may be removed the night before your next appointment. Resistant cases of heel pain caused by plantar fasciitis, heel spurs or cases of stress fracture of the calcaneus often need to be placed in a removable below knee cast boot. It is important to be aware of how your foot feels over this time period. If your foot is still uncomfortable without the strapping, but was more comfortable while wearing it, that is an indication that the treatment should help. Remember, what took many months or years to develop can not be eliminated in just a few days.
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.