Plantar Fasciitis (EFO_1001909) is inflammation of the plantar fascia (aponeurosis) on the bottom of the foot causing heel pain. The etiology of plantar fasciitis remains controversial but is likely to involve a biomechanical imbalance. Though often presenting along with HEEL SPUR, they do not appear to be causally related. Also known as: Chronic Plantar Fasciitis, Heel Spur Syndrome, Plantar Heel Spur, Plantar Heel Spurs, Policeman's Heel.