Pelvic congestion syndrome is a condition where veins in the pelvis become dilated and swollen, similar to varicose veins in the legs, causing chronic pain and heaviness in the lower abdomen. It accounts for a significant share of chronic pelvic pain cases in women, with one study finding it in 31% of women evaluated for ongoing pelvic symptoms. The condition primarily affects premenopausal women, especially those who have been pregnant more than once.
How Pelvic Veins Become Congested
In a healthy pelvis, blood flows upward through the ovarian veins toward the heart. Small valves inside these veins act like one-way gates, preventing blood from sliding back down. Pelvic congestion develops when these veins stretch and widen, causing the valves to stop closing properly. Blood then flows backward and pools in the pelvis, gradually expanding the veins into tangled, swollen clusters called pelvic varicosities.
Pregnancy is the biggest driver of this process. During pregnancy, pelvic veins can expand to 60 times their normal capacity to handle the increased blood flow needed for the growing uterus. In many women, the veins shrink back afterward. But with each pregnancy, the risk of permanent stretching increases, which is why the condition is found more frequently in women who have had multiple pregnancies. Estrogen also plays a role: it naturally relaxes and dilates vein walls, which helps explain why the condition is rare after menopause when estrogen levels drop.
What the Pain Feels Like
The hallmark of pelvic congestion is a dull, dragging pain deep in the pelvis that worsens after prolonged standing or sitting. Unlike menstrual cramps, the pain is not primarily tied to your cycle. It tends to build throughout the day and ease when you lie down, which makes sense because gravity pulls more blood into the dilated veins when you’re upright.
Pain during or after intercourse is one of the most distinctive symptoms, reported in roughly 71 to 78% of women with the condition. The discomfort is typically described as a dull ache rather than sharp pain, and it often lingers after sex rather than occurring only during it. Other common symptoms include a sense of fullness or pressure in the pelvis, visible varicose veins on the vulva or upper thighs, worsened hemorrhoids, bladder symptoms like frequent urination or incomplete voiding, and nocturia (needing to urinate at night). Some women notice all of these, while others have only one or two.
Who Is Most at Risk
Chronic pelvic pain of any cause affects about 15% of women aged 18 to 50 in the United States, and pelvic congestion is one of its leading causes. The classic profile is a premenopausal woman who has had two or more pregnancies. One study of healthy female kidney donors found that nearly 10% had ovarian vein insufficiency visible on imaging even without symptoms, suggesting mild vein dysfunction is common but doesn’t always cause problems.
Beyond pregnancy history, risk factors include jobs or routines that involve long periods of standing, a family or personal history of varicose veins in the legs, and chronic venous insufficiency (poor vein function elsewhere in the body).
How It Differs From Endometriosis
Pelvic congestion and endometriosis are the two most common causes of chronic pelvic pain in women, and their symptoms overlap enough to cause confusion. A few key differences help separate them.
- Pain timing: Endometriosis pain is strongly cyclical, worsening with menstruation and often starting a week before your period. Pelvic congestion pain is not cycle-driven and instead worsens after standing, sitting for long stretches, or intercourse.
- Pain during sex: Both conditions can cause it, but endometriosis pain tends to be deep and sharp during penetration, while pelvic congestion pain is a dull ache that often persists after sex.
- Fertility: Endometriosis is strongly associated with difficulty getting pregnant. Pelvic congestion, by contrast, is more common in women who have already had multiple pregnancies.
- Visible signs: A physical exam in endometriosis is often normal or may reveal tender nodules. Pelvic congestion may show visible bluish varicose veins on the vulva, vagina, or cervix.
The two conditions can also coexist, which is one reason pelvic congestion is sometimes missed during workups focused on endometriosis.
How It Is Diagnosed
Pelvic congestion can be tricky to diagnose because the dilated veins aren’t always obvious on a standard pelvic exam, and many women have already had normal-looking ultrasounds or even laparoscopies before the condition is identified. The key is using the right type of imaging.
Transvaginal ultrasound with Doppler (which measures blood flow direction) is a common first step. Doctors look for pelvic veins dilated beyond a certain threshold, typically 8 millimeters or larger, though some guidelines use cutoffs as low as 5 millimeters. In one study, 92% of women with confirmed pelvic congestion had at least one pelvic vein measuring 8 millimeters or more, compared to only 25% of women without the condition. The ultrasound also checks whether blood flows backward in the veins when you bear down, a sign that the valves are failing.
If ultrasound findings are suggestive but not conclusive, additional imaging with CT or MRI venography can map the veins in more detail. The gold standard is a venogram, where contrast dye is injected directly into the pelvic veins to visualize blood flow in real time. This is typically done only when treatment is being planned at the same time.
Treatment Options
Treatment usually starts conservatively and escalates based on how much the symptoms affect daily life.
Because estrogen dilates veins, medications that suppress estrogen production can reduce pain. These include progesterone-based options like injectable contraceptives or hormonal implants, which shift the hormonal balance away from estrogen. For more aggressive suppression, medications that temporarily shut down the ovaries’ hormone production may be used. These hormonal approaches can provide meaningful relief, though symptoms may return if the medication is stopped.
The most effective treatment for confirmed pelvic congestion is a minimally invasive procedure called ovarian vein embolization. A thin catheter is threaded through a vein in the neck or groin into the faulty pelvic veins using X-ray guidance. Small coils or a special glue are placed inside the dilated veins to block them off, redirecting blood flow through healthier veins. The procedure is done under local anesthesia or light sedation, typically takes about an hour, and most women go home the same day. Recovery usually involves a few days of mild soreness.
Pain management strategies like anti-inflammatory medications and physical therapy focusing on the pelvic floor can also help control symptoms, either as standalone approaches or alongside other treatments.