Hi ! It will be ideal to remove the portion of the vas which has developed some cyst/granuloma
at its end and send the cut portion for a histopathological study by the surgeon. The pain what you have could either be due to the pathology at the cut end of the vas or could also be due to the stretching of the peritoneum
(inner fascial covering of the abdomen) by the developing unsuspected inguinal hernia. Both the hernia, and the excision of the portion of the cut end of vas with the said pathology for biopsy
purpose can be dealt by the team of general surgeon
itself. It is not such a specialized urological problem to be dealt by urologist
only. However, I am not aware of the health care system in your location, and so you may have to discuss with your family physician keeping in view the constraints of your NHS. Wishing you an early recovery.