This question reaches surprisingly far from the pelvis, and that's the point. The left flank — your side, just under the ribs — is the territory of the left kidney and its vein. In Nutcracker syndrome, that vein is compressed between two arteries; pressure backs up into the kidney (flank ache, classically worse after exercise, sometimes blood in the urine) and down the left ovarian vein into the pelvis — which is how a kidney-level squeeze becomes pelvic congestion.
We're careful with the wording — "your side, just under the ribs" — because flank pain is routinely confused with lower-back pain, which is common, usually muscular or spinal, and not what this question hunts. That distinction is drawn straight from our community's experience: back pain answering "yes" here used to muddy the pattern, so the check now separates radiating back/hip pain from true flank pain.
If you answered yes: years of "kidney pain" with normal kidney scans, plus pelvic symptoms, is precisely the story that should put Nutcracker on an assessment list — see how compressions get confirmed.