What is fascia? Fascia is a thin casing of connective tissue that surrounds and holds every organ, blood vessel, bone, nerve fiber and muscle in place. The tissue does more than provide internal structure; fascia has nerves that make it almost as sensitive as skin. When stressed, it tightens up. (John Hopkins Medicine) I can show you how to hydrate your fascia with a tennis ball and you can gain more energy, flexibility, range of motion and feel good all day!