I have had chronic lower back/piriformis/psoas (the whole general region really) problems for years now. Hip flexor exercises and religious rolling on lacrosse balls keeps it at bay. But I do get flareups every once in awhile. This latest flareup includes a vague diffuse pain on the front side, sort of in the pelvic/groin/upper femur region. It actually doesn't hurt when I run, I just get random little shoots of pain when standing, sometimes while laying down, etc. There is nothing to press to make it painful (I've tried) and it comes and goes very quickly. Could this be sciatica?