Pain where the prostate used to be

I'm a little over a year out, and have been periodically having fairly sharp pains that seem to emanate from where the prostate used to be. Anybody else, and theories on the cause?

TIA

I have had aching, particulary in the morning which went on from the surgery and became more intense after the IMRT. It subsided to almost unnoticable untill the saturation biopsy and was intense for almost the entire month follow the sat biopsy and has now subsided almost entirely.

A sharp pain would concern me.

Best wishes. Scott