The structure protruding in a cystocele is the bladder. Specifically, the bladder pushes through the weakened anterior (front) vaginal wall and bulges into the vaginal canal. This is why a cystocele is also called a prolapsed bladder, fallen bladder, or anterior vaginal wall prolapse.
How the Bladder Loses Its Support
The bladder sits just behind the front wall of the vagina, held in place by a layer of connective tissue and the pelvic floor muscles beneath it. A key structure in this support system is a sheet of tough tissue that attaches to ligaments on either side of the pelvis, essentially forming a hammock that keeps the bladder from sagging downward.
A cystocele develops when this support system fails. The connective tissue can tear away from its attachments on one or both sides (a lateral defect), or it can thin and stretch in the middle (a central defect). Either way, the bladder drops from its normal position and presses into the vaginal wall, creating a visible or palpable bulge. Nerve damage to the pelvic floor muscles can compound the problem, since weakened muscles provide less structural backup even when the connective tissue is partially intact.
What Causes the Weakening
Vaginal childbirth is the most significant risk factor. The stretching and tearing that occur during delivery can damage both the connective tissue and the muscles that support the bladder. This damage sometimes doesn’t become apparent until years later, when aging and hormonal changes further weaken these tissues.
Parity (the number of pregnancies carried to term) and obesity are both strongly associated with increased risk. A large study of over 27,000 women found that the rate of cystocele was roughly 34% among women with a uterus and 33% among those who had previously had a hysterectomy, making it the most common form of pelvic organ prolapse. Being postmenopausal, overweight, or having chronic lung disease (which causes repeated straining from coughing) all raise the likelihood. Hispanic women had the highest risk for uterine prolapse specifically, while African American women demonstrated the lowest overall prolapse risk after adjusting for age and body mass.
How a Cystocele Differs From Similar Conditions
The vaginal canal can bulge in several directions depending on which organ has lost its support, and each type of prolapse has a different name based on the protruding structure:
- Cystocele: The bladder protrudes through the front vaginal wall.
- Urethrocele: The urethra (the tube that carries urine out of the bladder) protrudes through the front vaginal wall. This often accompanies a cystocele, forming what’s called a cystourethrocele.
- Rectocele: The rectum pushes into the back vaginal wall.
- Enterocele: A loop of small intestine, along with its lining tissue, herniates into the upper back vaginal wall.
A cystocele is examined by inserting a speculum blade to hold back the rear vaginal wall while the patient bears down. The prolapsed bladder appears as a soft, reducible bulge along the front wall. Posterior prolapse types are checked the opposite way, by retracting the front wall instead.
Grading the Severity
Clinicians measure how far the bladder has descended using one of two standardized systems. The Baden-Walker system uses five grades: Grade 0 means no prolapse, Grade 1 means the bladder has descended halfway toward the vaginal opening, Grade 2 means it has reached the opening, Grade 3 means it extends halfway beyond it, and Grade 4 is the maximum possible descent.
The more widely recommended POP-Q system uses the hymen as a fixed reference point and measures in centimeters. Stage I means the lowest point of the bulge is still more than 1 cm above the hymen. Stage II places it within 1 cm on either side. Stage III means it extends more than 1 cm past the hymen. Stage IV is complete eversion, where the vaginal wall has essentially turned inside out. Professional organizations favor this system because it produces more consistent, reproducible measurements between different examiners.
What It Feels Like
Mild cystoceles often cause no symptoms at all, and many women don’t know they have one. As the prolapse progresses, the most common complaints involve urinary changes: a feeling of incomplete emptying after urination, needing to urinate more frequently, or leaking urine during coughing, sneezing, or physical activity. Some women notice a sensation of pressure or fullness in the pelvis, or feel like something is “falling out.” In more advanced cases, you may be able to see or feel the bulge at the vaginal opening, and some women find they need to push the bulge back in to fully empty their bladder.
Symptoms tend to worsen with prolonged standing, heavy lifting, or straining and often improve when lying down, since gravity is no longer pulling the bladder downward.
How a Cystocele Is Managed
Treatment depends on severity and how much the prolapse affects daily life. For mild cases, pelvic floor exercises (Kegels) can strengthen the muscles that support the bladder and slow or prevent further descent. Maintaining a healthy weight and avoiding heavy lifting reduce the downward pressure on the pelvic floor.
A pessary is a common nonsurgical option for moderate to advanced prolapse. It’s a device inserted into the vagina that physically supports the bladder and holds it in place. Ring pessaries are the most commonly used type and work well for mild to moderate prolapse and stress incontinence. For more advanced cases, a Gellhorn pessary, which is disk-shaped with a central knob, provides stronger support. Other shapes, including U-shaped, donut, and cube designs, are available as alternatives depending on anatomy and comfort. Pessaries need to be removed periodically for cleaning and checked by a healthcare provider to prevent irritation.
Surgical repair is typically reserved for women whose symptoms significantly affect their quality of life and who haven’t found relief with other approaches. The goal of surgery is to restore the bladder to its normal position by reinforcing the weakened vaginal wall. The lifetime risk of undergoing at least one surgery for prolapse or urinary incontinence by age 80 is about 11%, and the likelihood increases with advancing age.