Here are the known complications for vasectomies. The complication rate is about 5%.
Mild Discomfort
Some men report a mild aching sensation to the scrotum for a few hours to a few days after the procedure.
Hematomas
Mild bleeding into the scrotum causing small tender swelling for a few days.(1/400). A major bleed into the scrotum causing a grapefruit sized scrotum which will take months to heal (1/1000).
Infection
Redness and pus from the healing site opening (1/100).
Epididymitis
Tender swelling of the epididymis, the tube connecting the vas deferens and the testes (1/100).
Sperm granuloma
A small, potentially uncomfortable, bead-like structure made of leaked sperm that may develop at the site where the tube was cut and blocked (1/500).
Post Vasectomy Pain Syndrome
A very rare complication of a persisting dull ache in the testicle where the inflammation does not settle down. It may resolve on its own or may need another surgical procedure 1/1000).
You may want to consider whether a scrotal ultrasound can help. This can evaluate any hematoma, masses or epididymitis arising from the procedure that may be contributing to your discomfort. Another option would be a pelvic CT scan to evaluate if any hernias or masses are present.
If post vasectomy pain syndrome is diagnosed, you may want to consider whether a repeat surgical procedure is an option.
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.
Thanks,
Kevin, M.D.