Hello and welcome to HCM
This type of pain which is going from 'loin to groin' ie it causes pain in the kidney
region and then to the testis is characteristic of ureteric stones.
When the stone moves from kidney to bladder through yreter it causes an intense pain.
The next step is ti get a X-ray of KUB region (Kidney-ureter-bladder region). Majority of kidney stones are visible on X-ray. However, if the stone is not visible further investigations like CT scan
will be helpful.
Treatment depends on the position of the stone, whether it is in the kidney or ureter. It can be surgical or non-surgical.
Thanks and take care
Dr Shailja P Wahal