Repeated small injuries to the fascia (with or without having inflammation) are considered the reason for plantar fasciitis. The injury is generally around to where by the plantar fascia attaches for your heel bone. This can be a bone spur from arthritis. In addition it may be a Haglund's deformity https://specialistsphere.com/foot-and-ankle-pain-explained-common-conditions-diagnosis-and-effective-treatments/