repeated tensile and compressional stresses on the arched foot
fascial anatomy focusing stress into narrow band of fibrocartilage
cycles of tearing and healing Release of chemical mediators of inflammation, producing pain
eventually, myxoid degeneration and weakening of the fascia
a pronated, flat foot and rarely a spontaneous rupture
painful scar tissue and calcification (spur formation)
Risk factors:
being over 40 and overweight are the main risk factors. Other risk factors:
sedentary lifestyle
reduced ankle dorsiflexion
hard surfaces
flat shoes
human leucocyte antigen (HLA) B27 associated spondyloarthropathies - this last association includes psoriatic and reactive arthritis and is commonly accompanied by bilateral plantar fasciitis, which confers a poorer prognosis for resolution
evidence of an occupational link is sparse, and plantar fasciitis is not recognised as a work-related or industrial injury
Reference:
ARC (February 2004). Hands On - practical advice on management of rheumatic disease, 2.
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