It is estimated that 1 in 10 people will develop Plantar Fasciitis in their lifetime. Plantar Fasciitis is an acute or semi-acute injury to the firm band of tissue on the sole of the foot called the Plantar Fascia which usually results in heel or arch pain.
There are various reasons why the plantar fascia becomes overstretched and painful. The most common cause is pronation or what most people refer to as flat feet. Without support the arches of the pronated foot gradually weaken placing more strain upon the plantar fascia resulting in inflammation and pain in the heel or arch of the foot. This heel or arch pain is a frequent complaint in middle-aged people, especially in those required to stand for long periods. Some research suggests that 81-86% of the patients with Plantar Fasciitis have excessive pronation.