The plantar fascia is a strong and thick ligament. It inserts in the heel and extends along the bottom of the foot, to the ball, and even sends slips into the base of the digits. Inflammation can occur anywhere along the ligament, but most commonly occurs at the heel or within the arch. Symptoms are usually gradual in onset with no definitive incident of injury; however, injury can induce plantar fasciitis. If symptoms persist, the pain can become chronic. Interestingly, while fasciitis denotes inflammation, biopsies in chronic cases have shown very few inflammatory cells at the area of pain. This has led to treatments focused on reinitiating the inflammatory process so the ligament can heal.
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