Exactly what causes
plantar fasciitis is not well understood. But it
probably develops as the result of repeated small tears in the
plantar fascia. Normally when you walk, your plantar fascia stretches as your
foot strikes the ground. If the plantar fascia is strained by the way you walk
or by repeated stress, it can become weak, swollen, and irritated (inflamed), and
it can hurt when you stand or walk.
Things that affect how the feet work
(biomechanical factors). These include abnormal inward twisting or rolling of
the foot (pronation), high arches, flat feet, tight calf
muscles, or tight tendons at the back of the heel (Achilles tendons).
activities, such as jobs that require prolonged walking or standing on hard or
irregular surfaces or sports such as running.
Things that put
extra stress on the feet, such as being overweight or wearing shoes that are
poorly cushioned, don't fit well, or are worn out.
process of aging. Plantar fasciitis is most common in middle-aged