For the last month I've had a stinging ache down one side of my groin - down the crease. I thought it was something to do with glands I could feel in the same area but I've had a scan and they are apparently normal. No outward sign of infection or swelling (other than the two palpable lymph nodes) but the pain is distracting and doesn't seem to be relieved by changing posture. No gynae symptoms either. I wonder now if it's muscular or nerve-related. Any ideas?