Respected user, hi I evaluated your query thoroughly. * According to your narration, that may be due to minute gravels passing from the ureter ( not detectable by MRI ) , non specific neuralgic pain related to irritation from ligament stretch / sprain or others . * Ultrasound report done if any , pain details more precisely like aggravating, relieving factors, exact site, any radiation to any portion, bowel movements, any noticeable bulge in groin are further details needed herewith to correlate . Hope this clarifies your query further . Thanks for using Healthcaremagic.com & giving us an opportunity to assist Welcome for any further assistance. Regards dear take care.