The fibrous tissue that surrounds muscle and separates a variety of tissues of the human body is called the fascia. The underside, or plantar, floor in the foot contains a strip of this tricky tissue, known as the plantar fascia, stretching with the heel towards the front of the bottom https://www.theorthopaedicandpainpractice.com/treating-foot-arch-pain-with-modern-orthopaedic-pain-management-techniques/