“…These may be related to the spine, peripheral nerves (sciatic and obturator), vessels, herniae, stress fractures, compartment syndromes and neoplasms. 1,2,3,[5][6][7][8][9][10][11] Occasionally, despite investigation, no cause can be found, and the outcome remains unsatisfactory. We present another possible cause of persistent pain which is related to the psoas muscle.…”