question: Hi, Im a 25 year old female with no serious medical history.  In the past 2 years I have had serious right flank pain that feels like someone is sticking a knife into my lower right back and it comes out my front.  Its a radiating pain, that comes and goes with no noticible pattern.  Ive been tested for Kidney Stones, had ultra sounds of my abdomin and bloodwork done.  I dont know if its something internal or muscular.  Help!