Fascia/ˈfeɪʃə/ Definition 1 of 5Pro Tip 1/3Medical Usage Fascia in medical contexts refers to tissue layers within the body. The injury required physical therapy to regain the fascia's flexibility. Pro Tip 2/3Surgical Term Surgeons often discuss fascia when planning procedures involving muscles. During the surgery, care must be taken not to damage the fascia. Pro Tip 3/3Not Just Muscles Fascia connects various body parts, not just skin to muscles. The pain is coming from a tear in the fascia near your abdomen.