Lower back pain can be either of the two as well. Generally
back/flank indicates kidney pain and the lower pelvic pain would
be more related to the bladder, urethra, etc. It is possible that
he has multiple stones in transit through the system or that there is
what we refer to as "gravel." This is small articles that come
through over a period of time and can be irrititating different areas
at the same time. Push fluids orally and encourage cranberry
juice if you have it onhand - otherwise water, tea, etc. will be
fine. Is he having any problem with passing the urine?
There is also another possibility and that is prostatitis. This
has symptoms similar to bladder and kidney infection. My
knowledge of this disorder is less so I have included a link to the
following site!
http://en.wikipedia.org/wiki/Prostatitis#Signs_and_symptoms
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