A couple of things could be considered. The first would be chronic prostatitis. This can certainly cause lingering symptoms if not properly treated. A digital rectal exam as well as culturing any prostatic fluid and possible transrectal ultrasound can be considered for further evaluation if the initial prostate exam is negative.
If there is pain in the testicle, then possibility of infection in the epididymis can be considered. An ultrasound of the scrotum would be a good start.
You may also want to consider sending off the sperm sample for analysis for a more thorough evaluation.
Discussion of these possibilities should be made with your urologist.
Followup with your personal physician is essential.
This answer is not intended as and does not substitute for medical advice - the information presented is for patient education only. Please see your personal physician for further evaluation of your individual case.
Kevin, M.D.
Medical Weblog:
kevinmd_b