By Lauren Opatrny, PT, DPT, PHRC San Francisco, CA   Ischial bursitis, or ischiogluteal bursitis, is a condition where the bursa that lies between the ischial tuberosity and the gluteus maximus muscle becomes inflamed.(1) Ischial tuberosities are the bones that we sit on and are commonly referred to as your “sits bones.” They provide support for the body while sitting …