Anterior Vaginal Prolapse (Cystocele): When the Bladder Bulges into the Vagina

An anterior vaginal prolapse, often called a cystocele, develops when the tissues supporting the bladder and the front wall of the vagina weaken. The bladder then descends and pushes into the vaginal wall, sometimes producing a noticeable vaginal bulge.

A cystocele is not cancerous and is not usually dangerous. However, it can cause pressure, discomfort, difficulty emptying the bladder, urinary leakage and recurrent urinary tract infections. Treatment depends on the severity of the prolapse and, more importantly, how much it affects daily life.

What normally supports the bladder?

The bladder rests above the front wall of the vagina. It is supported by:

Pelvic-floor muscles
Connective tissue and fascia between the bladder and vagina
Ligaments supporting the uterus and top of the vagina
The normal attachments of the vagina to the pelvic sidewalls

These structures work together rather like the ropes, fabric and anchor points of a hammock. When the supporting tissue stretches, tears or detaches, the front vaginal wall can descend and the bladder follows it.

Although commonly called a “fallen bladder,” the bladder has not become detached. It has lost some of its normal support.

How does a cystocele develop?

Usually, several factors contribute over time.

Pregnancy and vaginal childbirth

Pregnancy stretches the pelvic floor, while vaginal delivery can injure muscles, nerves and connective tissue. The risk may be higher after:

Multiple vaginal births
Forceps-assisted delivery
A prolonged second stage of labour
Delivery of a larger baby
Significant perineal injury

A prolapse may become apparent soon after childbirth or many years later.

Menopause and ageing

After menopause, falling oestrogen levels can make vaginal and supporting tissues thinner and less elastic. Ageing also changes collagen strength and muscle function.

Chronic pressure on the pelvic floor

Repeated increases in abdominal pressure may contribute, including:

Chronic constipation and straining
Persistent coughing
Heavy lifting
Obesity
High-impact activity in susceptible women

Previous pelvic surgery

A cystocele can occur after hysterectomy or previous prolapse surgery, particularly if the upper vaginal or apical support is weakened.

Inherited tissue characteristics

Some women naturally have more flexible connective tissue. Family history, joint hypermobility and certain connective-tissue disorders may increase susceptibility.

What does an anterior prolapse feel like?

A mild cystocele may cause no symptoms and may only be detected during an examination. More advanced prolapse can cause:

A vaginal bulge or lump
A sensation that “something is coming down”
Pelvic heaviness, dragging or pressure
Symptoms that worsen later in the day
Discomfort after prolonged standing or activity
Difficulty inserting a tampon
Discomfort or altered sensation during intercourse
Vaginal irritation, discharge or spotting when exposed tissue rubs on clothing

Some women describe the bulge as feeling like a small egg, golf ball or soft balloon at the vaginal opening.

The size seen during an examination does not always match symptom severity. A modest prolapse can be very troublesome, while a larger prolapse may cause surprisingly few symptoms.

How can a cystocele affect the bladder?

Because the bladder and urethra depend on coordinated pelvic support, a cystocele can produce several different and sometimes apparently contradictory urinary symptoms.

These may include:

A slow or intermittent urinary stream
Hesitancy before urine starts
The need to strain to urinate
A feeling that the bladder has not emptied
Needing to change position to finish urinating
Urinary urgency and frequency
Waking at night to urinate
Stress incontinence with coughing, laughing or exercise
Urge incontinence
Leakage after standing up from the toilet

Some women need to press the vaginal bulge backwards with a finger to empty the bladder. This is known as splinting or manual reduction.

Interestingly, a larger prolapse can sometimes kink or compress the urethra and temporarily hide stress incontinence. Once the prolapse is reduced with a pessary or repaired surgically, previously hidden leakage may become apparent. This is called occult stress urinary incontinence.

Can a cystocele cause urinary retention?

Yes. A significant prolapse may alter the angle between the bladder and urethra, obstruct urine flow or prevent the bladder muscle from emptying efficiently.

Possible consequences include:

Persistent residual urine after voiding
Recurrent urinary infections
Overflow leakage
Increasing difficulty passing urine
Bladder stones in uncommon cases
Upper urinary-tract obstruction or kidney problems in severe, longstanding prolapse

Complete acute retention is uncommon but requires urgent medical attention.

The amount remaining in the bladder can be assessed with a bladder ultrasound or catheter measurement. The prolapse may be reduced during testing to determine whether bladder emptying improves.

Why may urinary infections become more frequent?

A prolapse does not automatically cause infection. However, urine left in the bladder after voiding may provide an environment in which bacteria can multiply.

Menopause-related vaginal atrophy can add to this risk by changing the protective vaginal bacterial population and weakening the tissues around the urethra.

Not every episode of urgency, frequency or burning is an infection. Whenever practical, suspected recurrent UTIs should be confirmed with a midstream urine culture before antibiotics are prescribed.

Management may include:

Improving bladder emptying
Treating constipation
Using a pessary to reduce the prolapse
Low-dose topical vaginal oestrogen when appropriate
Culture-directed antibiotics for proven infection
Additional UTI-prevention measures in selected women

How is a cystocele assessed?

Assessment usually includes:

A detailed history of the bulge and urinary symptoms
Pelvic examination while lying down and sometimes standing
Asking the patient to cough or strain
Assessment of the front, back and top of the vagina
Evaluation of uterine or vaginal-vault support
Urine testing
Measurement of residual urine after voiding
Assessment for vaginal atrophy
Pelvic-floor muscle assessment

Clinicians commonly describe prolapse using the Pelvic Organ Prolapse Quantification system, known as POP-Q.

A bladder diary, kidney ultrasound, cystoscopy or urodynamic study may be appropriate when there is significant retention, recurrent infection, complex incontinence, previous pelvic surgery or uncertainty about bladder function.

Does every cystocele need treatment?

No. Treatment is generally based on symptoms, not examination findings alone.

A mild or moderate prolapse that is not bothersome can often be observed. Prolapse is not inevitably progressive, and delaying treatment does not usually make later surgery impossible.

Treatment becomes more appropriate when the prolapse causes:

A troublesome bulge
Difficulty emptying the bladder
Recurrent infections associated with residual urine
Vaginal ulceration or bleeding
Limitations on exercise, work or sexual activity
A significant effect on quality of life

Can the prolapse be reduced?

A prolapse may be gently pushed back into the vagina. This does not permanently repair the weakened support, but it can temporarily restore the anatomy and improve comfort or bladder emptying.

Some women manually reduce the prolapse before passing urine. If this is frequently necessary, medical assessment is advisable.

A clinician may also reduce the prolapse during an examination, bladder-emptying test or urodynamic study. A vaginal pessary provides more sustained non-surgical reduction.

If a prolapse suddenly becomes very painful, cannot be reduced, causes heavy bleeding or is associated with an inability to urinate, urgent assessment is required.

Conservative management

Observation

When symptoms are mild, reassurance and periodic review may be all that is required.

Pelvic-floor physiotherapy

A pelvic-floor physiotherapist can assess muscle strength, coordination and relaxation. An individualised program may:

Improve mild prolapse symptoms
Reduce the sensation of heaviness
Improve stress or urge incontinence
Teach safer lifting and pressure-management techniques
Assist bowel emptying without excessive straining

Exercises cannot reliably “pull back” a large prolapse permanently, but they can improve symptoms and support bladder control.

Addressing contributing factors

Helpful measures may include:

Treating constipation
Avoiding repeated straining
Managing chronic cough
Gradual weight reduction where appropriate
Modifying heavy lifting
Using good lifting and breathing techniques
Maintaining regular, low-impact physical activity

Women should not be frightened away from exercise. The aim is sensible modification rather than unnecessary restriction.

Vaginal pessary

A pessary is a removable silicone device placed inside the vagina to support the prolapse. Common designs include ring pessaries and space-filling pessaries.

Advantages include:

Avoiding or postponing surgery
Rapid improvement in bulge symptoms
Possible improvement in bladder emptying
Suitability for women planning future pregnancy
Use in women who are not medically fit for surgery
The ability to assess whether prolapse reduction reveals stress incontinence

Finding the correct size sometimes requires more than one fitting. Follow-up is important to check comfort, bladder emptying and vaginal health.

Possible problems include discharge, spotting, odour, difficulty removing the device and vaginal ulceration. These risks are reduced by appropriate fitting, regular review and, in suitable postmenopausal women, topical vaginal oestrogen.

When is surgery considered?

Surgery may be considered when:

Conservative treatment has not provided adequate relief
The prolapse extends to or beyond the vaginal opening
Bladder emptying is significantly impaired
The patient does not want or cannot manage a pessary
Symptoms substantially affect quality of life

The goal is to improve symptoms and function, not simply to make the examination look anatomically perfect.

Before surgery, the surgeon should discuss:

The patient’s most troublesome symptoms
Sexual activity and future preferences
Whether the uterus is present
Previous pelvic surgery
The strength of apical or upper-vaginal support
Existing or occult urinary incontinence
The possibility of recurrence
The benefits and complications of each surgical route

Native-tissue anterior vaginal repair

The most established vaginal operation for a cystocele is an anterior colporrhaphy, also called an anterior vaginal repair.

Through an incision in the front vaginal wall, the bladder is carefully separated from the vagina. The patient’s own supporting tissue is then folded, tightened or reattached, and the vaginal incision is closed with dissolving sutures.

This is a native-tissue repair, meaning no permanent synthetic mesh is placed through the vagina.

Possible complications include:

Bleeding or infection
Temporary difficulty emptying the bladder
Urinary tract infection
Injury to the bladder or ureters
New or persistent urinary urgency
New or unmasked stress incontinence
Pain during intercourse
Vaginal narrowing
Recurrence of the prolapse
Need for further prolapse or continence surgery

A catheter may be required temporarily until bladder emptying is satisfactory.

Why apical support matters

A cystocele is not always an isolated defect. Weakness at the top of the vagina or uterus can pull the front wall down.

Repairing only the visible cystocele without addressing significant upper-vaginal weakness may increase the likelihood of recurrence. Surgery may therefore include an apical suspension procedure, with or without hysterectomy, depending on the anatomy and the patient’s preferences.

Options may include:

Uterosacral ligament suspension
Sacrospinous fixation
Uterine-preserving hysteropexy
Abdominal or laparoscopic sacrocolpopexy

Sacrocolpopexy and abdominal mesh

Sacrocolpopexy is usually performed laparoscopically or robotically. Surgical mesh is attached to the vagina and then secured to the sacrum to restore upper-vaginal support.

This is different from placing a mesh sheet through a vaginal incision to repair a cystocele. Abdominally placed mesh remains available in Australia for selected prolapse operations.

It has its own risks, including mesh exposure or erosion, infection, pain, bowel or urinary injury and the possibility of further surgery. The benefits and risks should be discussed carefully.

Transvaginal synthetic mesh in Australia

Permanent synthetic mesh kits previously used through a vaginal incision for pelvic organ prolapse caused significant concern because of complications such as:

Mesh exposure through the vaginal wall
Chronic pelvic or vaginal pain
Painful intercourse
Infection
Bladder or urethral erosion
Urinary problems
Difficult or incomplete mesh removal

Following a review of safety and effectiveness, the Australian Therapeutic Goods Administration removed transvaginal mesh products intended solely for treating pelvic organ prolapse from the Australian Register of Therapeutic Goods. TGA information about urogynaecological mesh

This restriction does not mean that all uses of surgical mesh are identical. It is important to distinguish:

Transvaginal mesh sheets used to treat prolapse
Small mid-urethral slings used for stress urinary incontinence
Mesh placed abdominally during sacrocolpopexy
Biological grafts or allografts

Each involves different materials, surgical approaches, benefits and risks.

What is the role of an allograft?

An allograft is processed human donor tissue. Examples include donor fascia lata obtained from the strong tissue of the thigh.

A biological graft may be placed to reinforce weakened vaginal support. It is not the same as permanent polypropylene mesh. The material acts as a scaffold and is gradually remodelled or absorbed to varying degrees.

The proposed advantages include:

Avoiding permanent synthetic mesh
Providing reinforcement where native tissue is weak
Potentially reducing permanent foreign-body complications
Offering an option in selected reconstructive or repeat operations

However, these theoretical advantages do not mean that an allograft is routinely better than native-tissue repair.

Limitations of allograft repair

Available evidence has not established that biological graft reinforcement consistently provides better long-term outcomes than a well-performed native-tissue anterior repair. Some grafts may stretch or lose strength as they remodel, and prolapse can recur.

Potential limitations and complications include:

Graft failure or absorption
Recurrent prolapse
Infection
Inflammatory or wound-healing problems
Vaginal exposure, although generally less characteristic than with permanent synthetic mesh
Additional cost
Limited long-term product-specific evidence
An extremely low theoretical risk of disease transmission despite donor screening and processing

A major Cochrane review concluded that evidence does not support routine use of biological grafts over native-tissue repair for vaginal prolapse. Cochrane review of transvaginal mesh, grafts and native-tissue repair

For most women undergoing a first anterior repair, native tissue remains the usual vaginal surgical approach. An allograft may be considered selectively, for example, in complex reconstruction, poor-quality tissue or recurrent prolapse, but this should involve careful informed consent and discussion of the uncertainty in long-term benefit.

Women should ask:

What exact graft product is proposed?
Is it included on the Australian Register of Therapeutic Goods?
Why is it preferable in my particular case?
What evidence supports its use for anterior prolapse?
What are the surgeon’s results and complication rates?
What alternatives are available without graft material?

UGSA and USANZ guidance

The Urogynaecological Society of Australasia (UGSA) supports specialist training, credentialing and appropriate governance for clinicians implanting or removing transvaginal mesh. Its published position material emphasises that mesh procedures and mesh-complication surgery require suitable training, experience, consent and clinical oversight. UGSA position statements

The Urological Society of Australia and New Zealand (USANZ) represents urologists involved in treating urinary dysfunction, retention, recurrent infection and pelvic-floor disorders.

There is no joint UGSA–USANZ statement recommending allograft reinforcement for routine anterior prolapse repair. It would therefore be inaccurate to suggest that either organisation endorses routine allograft use.

The practical Australian approach is individualised and evidence-based:

Treat symptoms rather than the examination alone
Offer observation, pelvic-floor physiotherapy and pessary management where appropriate
Assess bladder emptying and culture suspected recurrent infections
Use native-tissue repair as the usual vaginal surgical option
Evaluate and restore apical support where necessary
Avoid routine transvaginal permanent synthetic mesh for prolapse
Reserve biological grafts or other specialised reconstruction for carefully selected patients
Provide clear consent regarding alternatives, uncertainty, recurrence and complications

Recovery after anterior prolapse surgery

Recovery varies according to the procedure. Patients can generally expect:

A temporary urinary catheter
A bladder-emptying assessment before discharge
Light vaginal bleeding or discharge
Pelvic discomfort for several days
Avoidance of constipation and straining
Gradual return to walking and daily activities
Temporary restrictions on heavy lifting and vaginal intercourse

Urgent advice should be sought for fever, heavy bleeding, worsening pain, inability to urinate, offensive discharge, calf swelling, chest pain or shortness of breath.

Can a cystocele return?

Yes. Surgery repairs the current weakness but cannot permanently reverse ageing, tissue quality or every future pressure placed on the pelvic floor.

Recurrence does not always require another operation. A recurrent prolapse may be mild and successfully managed with observation, physiotherapy or a pessary.

Reducing constipation, treating chronic cough, maintaining a healthy weight and using sensible lifting techniques may help protect the repair.

The take-home message

An anterior vaginal prolapse occurs when weakened support allows the bladder to bulge into the front wall of the vagina. It can cause pressure, urinary leakage, incomplete emptying, retention and recurrent infections, but treatment is only necessary when symptoms are troublesome or bladder function is affected.

Conservative measures, particularly pelvic-floor physiotherapy and a vaginal pessary, are effective options for many women. When surgery is needed, native-tissue anterior repair remains the usual vaginal procedure in Australia, often combined with restoration of upper-vaginal support.

Processed human-tissue allografts are different from permanent synthetic mesh, but current evidence does not support their routine use for every cystocele. Their role is selective and should be discussed with a surgeon experienced in female pelvic-floor reconstruction.

So, if you can feel a bulge and it is affecting your waterworks, come see your local urogynaecologist or local Brisbane urologist specialising in this field.

This article provides general information and does not replace individual medical advice. Treatment should be selected after assessment by an appropriately trained urologist, urogynaecologist or gynaecologist.