The plantar fascia may become irritated and inflamed when subjected to too much strain, leading to soreness and pain, normally felt from the heel. Genu valgum (knock knees) Genu valgum or "knock knees" can be a deformity of your reduced extremities. Virtually all patients tend not to get any signs. https://www.theorthopaedicandpainpractice.com/treating-foot-arch-pain-with-modern-orthopaedic-pain-management-techniques/