Posted: 24/02/2014 at 18:53
Just got over a similar injury/pain in this area which was as a result of tight hip flexors. I had pain in the lower abdomen, lower back and pelvic areas.
Cause? Rigorous speed work, hill training in the lead up to half marathon with the added challenge of running in very cold and icy conditions (I live in Canada).
I had thought it was something more serious, went to my GP, all tests came back negative.
Hope this helps.