Plantar Fasciitis is an inflammation caused by excessive stretching of the Plantar Fascia, the thick band of tissue that runs underneath your foot connecting the heel bone to the toes. Also referred to as Heel Pain and Arch Pain, this condition is most often caused by over-pronation (or flat feet), but can also result from a sudden increase in excercise levels, being overweight and from poor fitting or poor quality footwear.