The fibrous tissue that surrounds muscle and separates various tissues of the human body is known as the fascia. The underside, or plantar, surface area with the foot includes a strip of the rough tissue, often called the plantar fascia, stretching through the heel towards the front of the bottom https://www.theorthopaedicandpainpractice.com/treating-foot-arch-pain-with-modern-orthopaedic-pain-management-techniques/