This started two days ago, and I could best describe it as a straining or pulling pain. It feels like it is pulling if I stand up very straight or stretch, and is a mild to moderate pain. At first I thought it was the start of a bladder infection, but I am not having frequent, painful urination - just this darn pulling feel. Is it possible to get a muscle strain down there (I didn't do anything that I am aware of that might have caused it, although I did lift a moderately heavy box the day symptoms started come to think of it!) Any idea what this could be and how I can treat it? Asprin does seem to help control the discomfort somewhat.