What is pelvic venous disorder?
Pelvic venous disorder — PeVD for short — is an umbrella term for pelvic pain caused by veins that aren't draining properly. You may also hear the older name pelvic congestion syndrome (PCS).
Three overlapping problems sit under this umbrella:
- Pelvic congestion — the ovarian (gonadal) veins leak backwards, so blood pools in the pelvis instead of returning to the heart.
- May-Thurner syndrome — the left iliac vein (the main vein draining the left leg) is squeezed by an artery crossing over it.
- Nutcracker syndrome — the left renal (kidney) vein is compressed between two arteries.
Because these can cause one another and often coexist, specialists increasingly look at the whole venous system — abdomen, pelvis and legs — rather than one vein at a time.
What does it feel like?
Everyone's experience is different, but the pattern women describe most often:
- A dull, dragging ache or heaviness in the pelvis, often worse after standing or sitting for long periods and eased by lying down
- Pain that is worse on one side, often the left
- Pain during or after sex that can linger for hours
- Visible veins in unexpected places — vulva, inner thigh, buttock — sometimes first appearing in pregnancy
- With May-Thurner: one leg (usually the left) more swollen or heavy
- With Nutcracker: left flank pain, sometimes blood in the urine
Who does it affect?
PeVD mostly affects women of childbearing age, and pregnancy is the most common trigger — pelvic veins stretch to carry many times their usual blood flow and don't always recover. Symptoms are frequently dismissed as period pain, stress, or a normal consequence of childbirth, which is why many women live with it for years before anyone looks at their veins.
How is it diagnosed?
There's no single test. The usual path is a specialist assessment plus imaging that is designed to look at veins — often a duplex ultrasound first, then MR or CT venography, and in some cases a catheter venogram, which is also when compression like May-Thurner is confirmed. A scan that wasn't protocoled for veins can look "normal" while missing the problem.
How is it treated?
Treatment targets the faulty veins themselves — typically embolisation (closing the leaking vein from the inside), or a stent where a compressed vein needs holding open. These are minimally invasive, image-guided procedures performed by interventional radiologists. Which one (if any) fits depends on what the imaging shows — another reason a complete venous work-up matters.
Questions to bring to your doctor
- "Could my pelvic pain be venous? Can we image my pelvic veins specifically?"
- "My symptoms worsen with standing and ease lying down — does that pattern point anywhere?"
- "Should I be assessed for May-Thurner or Nutcracker as well as pelvic congestion?"
- "Would you refer me to an interventional radiologist or vascular specialist?"