Pelvic Congestion Syndrome Urinary Symptoms and Bowels

The main symptom of pelvic congestion is a dull, heavy pelvic ache. But many women also ask about pelvic congestion syndrome urinary symptoms, such as needing to pass urine urgently or often, and about bowel problems like constipation, loose stools or discomfort in the back passage. This page explains why the veins might play a part, what the evidence actually shows, which other conditions cause the same symptoms, and which warning signs need prompt attention.

Why pelvic veins might affect the bladder and bowel

In pelvic congestion syndrome (PCS), veins around the womb and ovaries widen and blood flows backwards through them. These veins are part of a connected network. Branches run around the bladder, the vagina and the rectum, and connect with the veins around the anus.

When this network is swollen, a few things may happen:

Congested veins may press on, or irritate, the bladder and bowel next to them
The bladder and bowel share nerve pathways with the other pelvic organs, so pain from one area can be felt in another
Reflux can spread into veins around the bladder neck, vagina and back passage

These ideas make sense, but they are mostly theory. It is important to be honest about how little has been proven.

What the evidence shows

Bladder and bowel symptoms are listed by many specialist societies as possible features of PCS. The research behind this is limited:

Surveys. In an online survey of women from a pelvic congestion support group, many reported bladder symptoms such as passing urine often or pain when passing urine, and over half reported IBS-type bowel symptoms. Surveys like this rely on self-reporting from people who chose to answer, so they can overstate how common a symptom is.
Bladder pain studies. A US study of women with bladder pain syndrome found imaging signs of pelvic vein problems in almost half of those who had scans. This was a look back at existing records. It shows the two often appear together, not that one causes the other.
Treatment studies. Some small studies of embolisation report improvement in a range of symptoms. They are mostly not randomised, so other explanations cannot be ruled out.

The fair summary is that bladder and bowel symptoms are commonly reported alongside PCS, and may sometimes be caused by it, but this is not proven.

Bladder symptoms

Urgency and frequency

Some women with PCS describe needing to pass urine more often or more urgently, sometimes worse when the pelvic ache is at its worst, such as late in the day or before a period. A congested pelvis may make the bladder feel full sooner.

Bladder pain and “UTI-like” symptoms

Some women describe a pressure or ache over the bladder, or symptoms that feel like a urine infection but with clear urine tests. That pattern also fits bladder pain syndrome (interstitial cystitis), a condition that can occur alongside pelvic vein problems.

What else could cause bladder symptoms?

These common causes need to be ruled out before symptoms are put down to veins:

Urinary tract infection (UTI): burning or stinging, cloudy or smelly urine, needing to go often. A simple urine test helps.
Overactive bladder: sudden urges, sometimes with leaking, often made worse by caffeine and fizzy drinks.
Bladder pain syndrome: pain that builds as the bladder fills and eases after emptying, with normal urine tests.
Prolapse or pelvic floor problems: a heavy, dragging feeling, difficulty emptying, or leaking on coughing.
Endometriosis on or near the bladder, which often flares with periods. Our page comparing pelvic congestion and endometriosis explains the differences.
Pregnancy, diabetes and some medicines, which can all increase how often you pass urine.

Bowel symptoms

Constipation

There is no good evidence that PCS causes constipation. But the two can affect each other. Straining raises pressure inside the tummy and pelvis, which can make congested veins ache more. Hard stools and straining also put strain on the pelvic floor. Plenty of fluids, fibre, regular activity and not delaying when you need to go all help.

Loose stools and IBS-type symptoms

Some women with PCS report bloating, cramping and a mix of loose stools and constipation, similar to irritable bowel syndrome (IBS). IBS is very common in its own right, and it is not known whether the veins play a part. Bloating on its own is covered in our page on weight gain, bloating and other symptoms.

Haemorrhoids and veins around the back passage

Because the pelvic veins connect with the veins around the rectum and anus, reflux in the pelvis may show up as haemorrhoids (piles) or swollen veins around the back passage in some women. Some specialists look for these during a pelvic vein scan. Haemorrhoids are also very common for other reasons, especially constipation, straining and pregnancy.

Rectal discomfort or pain in the anus

Some women describe a heavy, full or aching feeling in the back passage, which may be linked to congested veins nearby. Other causes include haemorrhoids, a small tear in the skin of the anus (anal fissure), tight pelvic floor muscles and endometriosis. A sharp pain when opening your bowels is more typical of a fissure than of veins.

How doctors work out the cause

A doctor will ask about the timing of your symptoms and how they relate to periods, standing, sex and meals. Simple tests often come first, such as a urine test, and sometimes blood tests or a stool test. An examination can look for prolapse, pelvic floor tension and haemorrhoids.

If your symptoms fit the wider pattern of pelvic congestion symptoms, such as an ache that builds through the day and eases lying down, a pelvic vein scan may be suggested. Depending on your symptoms, you may also be referred to a urologist, gynaecologist or bowel specialist. More than one cause can be present, and our guide to chronic pelvic pain explains the wider picture.

Will treating the veins help my bladder or bowels?

It might, but it is not guaranteed. If PCS is confirmed and treated, some women notice their bladder or bowel symptoms ease along with the pelvic ache. Others do not, especially if another condition such as IBS or bladder pain syndrome is also present. It is reasonable to ask your specialist which of your symptoms they expect treatment to help, and which they do not. A Singapore vascular surgeon’s PCS questions and answers cover what treatment involves, and our guide to pelvic congestion syndrome treatment compares the options.

When to see a doctor

See a doctor if you have bladder or bowel symptoms that last more than a few weeks, keep coming back, or come with long-term pelvic pain. Our pelvic symptom check can help you organise your symptoms before an appointment.

See a doctor promptly if you have:

Blood in your urine, even once
Blood in your stools, or black, tarry stools
A change in bowel habit that lasts several weeks
Unexplained weight loss, or persistent bloating and feeling full quickly
Burning when passing urine with fever, chills or pain in your back or side

Get urgent medical help if you cannot pass urine at all, have heavy bleeding from the back passage, severe tummy or pelvic pain, fever with pelvic pain, or feel faint. In Singapore, call 995 in an emergency.

Frequently asked questions

Can pelvic congestion syndrome cause urinary frequency?

It may. Some women with pelvic congestion describe needing to pass urine often or urgently, especially when the pelvic ache is bad. The veins around the bladder can be congested too. But frequency is far more often caused by a urine infection, an overactive bladder, bladder pain syndrome or drinking a lot of fluid, so these should be checked first.

Can pelvic congestion syndrome cause constipation?

There is no clear evidence that it does. Constipation is very common and has many causes, including diet, fluids, medicines and pelvic floor problems. It can make pelvic congestion symptoms feel worse, because straining raises pressure in the pelvic veins. Treating constipation is a sensible step whatever the cause.

Can pelvic congestion cause diarrhoea?

Some women with pelvic congestion report bowel symptoms that look like irritable bowel syndrome, with bouts of loose stools, constipation or both. It is not known whether the veins cause this. Ongoing diarrhoea, especially with blood, weight loss or waking at night to open your bowels, needs medical assessment.

Is pelvic congestion syndrome linked to haemorrhoids?

The pelvic veins connect with the veins around the rectum and anus, so reflux in the pelvis can sometimes show up as haemorrhoids or veins around the back passage. Haemorrhoids are also very common for other reasons, such as constipation and pregnancy.

Can pelvic congestion syndrome cause pain in the anus?

Some women describe an aching, heavy or full feeling in the back passage. This may be linked to congested veins nearby. Pain in the anus has many other causes, including haemorrhoids, a small tear (anal fissure) and tight pelvic floor muscles, so it is worth having it examined.

Sources and further reading

This article is general information, not personal medical advice. Please speak to a doctor about your own symptoms. How we create our content.