What Happens When a Bladder Sling Fails?

When a bladder sling fails, the most common outcome is a return of urinary leakage, but failure can also show up as new problems that were not there before surgery: difficulty emptying the bladder, chronic pain, recurrent infections, or sudden urges to urinate that feel impossible to control. The failure rate for midurethral slings sits somewhere between 5% and 20% depending on how failure is defined and how long patients are followed.¹ That range is wide because “failure” is not one thing. For some women it means the sling simply stopped holding the urethra in place. For others, the mesh triggered complications that created a whole new set of symptoms.

What “Failure” Actually Looks Like

The simplest version of sling failure is straightforward: stress incontinence comes back. You cough, sneeze, or jump, and you leak again. This can happen within weeks of surgery or years later. The sling may have loosened, shifted position, or never provided enough support in the first place. One study investigating why some slings underperform found that improper tape positioning during the original operation can let the sling displace during the critical step of tensioning, reducing its effectiveness.²

But recurring leakage is only one face of failure. Many women develop symptoms they never had before. A study of patients who developed urethral erosion from their sling found that about two-thirds presented with urinary tract infection symptoms, roughly half had new overactive bladder symptoms like urgency and frequency, about 42% had recurrent incontinence, and nearly one in ten experienced pain during intercourse.³ Many of these patients had several of those problems at once. Failure, in other words, does not always look like the original problem returning. It can look like a completely different urological condition.

New Bladder Symptoms That Emerge After Surgery

One of the more frustrating outcomes of sling surgery is developing overactive bladder symptoms you did not have before. You went in for leakage with coughing and came out with sudden, intense urges to urinate, frequent trips to the bathroom, or a new form of leakage driven by urgency rather than physical stress. Between 5% and 25% of women report persistent, worsening, or new-onset overactive bladder after sling surgery.⁴ A large study tracking over 6,700 patients who had no overactive bladder before their procedure found that about 6% developed it within the first year, with urgency being the most common complaint.⁵

In some cases, the overactive bladder symptoms stem from a recognizable, correctable cause: the sling is too tight, there is an infection, or the mesh has eroded into the bladder or urethra. In other cases, the mechanism is less clear, and the symptoms persist even after obvious problems have been addressed. This is one of the trickier aspects of post-sling complications, because distinguishing between a mechanical problem with the sling and an overactive bladder that emerged for unrelated reasons requires careful evaluation.

Voiding Difficulty and Urinary Retention

If the sling is placed too tightly or swelling after surgery compresses the urethra, you can end up unable to empty your bladder properly. This ranges from a weak or slow stream to complete urinary retention, where nothing comes out at all. One study examining patients referred for voiding problems after sling placement found that 24 experienced acute urinary retention, 14 had isolated voiding symptoms like a slow stream, and another group had a mix of voiding difficulty and overactive bladder symptoms. Nearly 70% of those evaluated had a notably weak urine flow.⁶ The incomplete emptying itself creates a cascade: leftover urine sitting in the bladder raises the risk of urinary tract infections, which were present in 14 of the patients in that same study.

Most voiding difficulty that appears in the first days or weeks after surgery improves on its own as swelling goes down. When it does not, the sling itself is usually the problem, and some kind of surgical adjustment becomes necessary.

When the Mesh Causes Physical Damage

The synthetic mesh used in slings can erode into surrounding tissue. The most commonly discussed form is vaginal erosion, where a piece of mesh pokes through the vaginal wall, but it can also erode into the urethra or even the bladder. A wide range of complications has been linked to mesh implants, including pain, erosion, voiding dysfunction, infection, recurrent urinary tract infections, fistulae, organ perforation, vaginal scarring, and neuromuscular problems.⁷

Urethral erosion specifically tends to show up not as visible mesh but through symptoms that mimic other conditions. In a study of 21 patients with confirmed urethral erosion from their slings, the majority first came in complaining of what seemed like a urinary tract infection. It was only after further investigation that the erosion was discovered. Of these patients, 86% needed formal surgical repair of the urethra along with a period of catheterization.³ This highlights one of the real risks of mesh complications: they often disguise themselves as something else, which can delay proper treatment.

Chronic Pain and Nerve Injury

Persistent pain after sling surgery is uncommon but can be debilitating when it occurs. For retropubic slings (the type passed behind the pubic bone), the rate of persistent pain is estimated at around 1%.⁸ When it does happen, nerve injury or mechanical distortion of pelvic nerves is a suspected cause. Based on case reports and cadaveric dissections, retropubic slings can potentially affect the pudendal, ilioinguinal, and iliohypogastric nerve branches, all of which serve the groin and pelvic region.

Transobturator slings (the type passed through the inner thigh) carry their own nerve risks. One documented case involved a woman who developed persistent pain in her left labia and pain during intercourse that lasted four years after transobturator sling placement. The problem was ultimately traced to the genitofemoral nerve.⁹ Nerve-related pain from slings can be difficult to pin down because it does not always show up on standard imaging. Diagnosis often requires specialized testing like sensory mapping.

Pain can also come from the mesh itself contracting, stiffening, or pulling on surrounding tissue without any nerve involvement. This kind of pain tends to be more localized and may worsen with specific movements, sitting, or sexual activity.

Who Is More Likely to Experience Failure

Some women carry higher odds of sling failure from the start. A study using multivariate analysis identified several independent risk factors: a body mass index over 25 roughly tripled the odds, having mixed incontinence (both stress and urgency types) more than doubled them, previous continence surgery about doubled them, and both intrinsic sphincter deficiency and diabetes also increased the risk.¹⁰ None of these factors make failure a certainty, but they help explain why outcomes vary so much from patient to patient.

The surgeon’s experience also plays a meaningful role. A study of over 59,000 sling procedures found that higher-volume surgeons, those performing more than 40 procedures per year, had a lower overall reoperation rate compared with lower-volume surgeons. The difference was especially visible when looking specifically at reoperation for surgical failure.¹¹ A separate analysis found that the odds of revision declined with each additional case a surgeon performed per year, with the benefit plateauing around 110 cases annually. That study also found that having a prolapse repair done at the same time as the sling increased the odds of needing a revision.¹² Interestingly, the surgeon’s specialty and the type of hospital did not seem to matter once volume was accounted for.

How Problems Are Identified

Figuring out exactly what has gone wrong with a sling is not always straightforward. A physical exam can reveal vaginal mesh exposure, and cystoscopy (a camera inserted into the bladder) can detect erosion into the urethra or bladder. But some problems are harder to see. Pelvic floor ultrasound has become an increasingly useful tool because the mesh appears as a bright, easily visible structure on the image, and the scan can be done with the patient moving, bearing down, or coughing. This dynamic assessment allows doctors to evaluate whether the sling has shifted, folded, or is pressing on the urethra too tightly.¹³

Ultrasound is particularly helpful in cases where a woman has pain, recurrent infections, or voiding difficulty but the standard pelvic exam and cystoscopy look normal. Translabial ultrasound can reveal sling disruption, folding, urethral impingement, and erosion into surrounding structures that might otherwise go undetected.¹⁴ If you are dealing with persistent symptoms after sling surgery and your doctor has not yet performed imaging beyond a standard exam, asking about pelvic floor ultrasound is reasonable.

What Happens If the Sling Needs to Come Out

When a sling causes obstruction, persistent pain, or erosion, surgical intervention is usually needed. The options range from minimally invasive to more involved, depending on the specific problem.

For obstruction, one common approach is sling transection: the surgeon cuts through the tape underneath the urethra to release the tension without removing the entire sling. In one study of 461 sling patients, about 6% underwent this procedure under local anesthesia and were followed for at least five years afterward.¹⁵ The tradeoff is that cutting the sling often relieves the obstruction but can bring back the incontinence, since the sling is no longer providing support.

For more extensive complications like erosion or chronic pain, partial or full sling removal may be necessary. A study tracking outcomes after sling removal in women with chronic voiding dysfunction found significant improvement in voiding symptoms and overall symptom burden. Voiding difficulties dropped from 100% to under 7% of the group after surgery. Nearly half became completely symptom-free. Those who continued to have some symptoms, such as urgency incontinence or recurrent UTIs, were managed with pelvic floor rehabilitation or medication. Only one patient in the study needed further intervention with a nerve-stimulation device, and even that patient improved significantly.¹⁶

These results are encouraging, but they come with caveats. Removing mesh that has integrated into tissue is technically challenging, and the amount of mesh that can safely be taken out varies from patient to patient. Complete removal is not always possible, especially when the mesh has eroded into the urethra or become embedded in scar tissue.

Effects on Sexual Function

Sexual dysfunction related to sling failure deserves its own mention because it is frequently underreported and underdiscussed. Pain during intercourse can arise from mesh erosion into the vaginal wall, from scar tissue forming around the sling, or from nerve irritation. Transobturator slings in particular have been flagged for their potential to cause pain during intercourse.¹⁷

When dyspareunia from a sling becomes severe enough to warrant sling removal, most aspects of sexual function tend to improve afterward. A study evaluating women who had their slings removed specifically because of pain during sex found statistically significant improvements in desire, arousal, lubrication, satisfaction, and pain. The one domain that did not improve was orgasm, which was already low before surgery and remained low afterward.¹⁸ That finding suggests the sling may not be the sole source of sexual difficulty in some patients, and expectations about what removal can and cannot fix should be realistic.

The Emotional and Psychological Toll

The physical symptoms of sling complications get most of the medical attention, but the psychological burden can be just as severe. A qualitative study that explored women’s experiences with mesh complications found that the impact was frequently described as traumatic. Participants reported increased anxiety, feelings of being trapped by persistent pain, and regret about having the surgery. Several reported suicidal thoughts, and one was hospitalized after an overdose. The constant pain and the sense that nothing could be done to fix it pushed some women to a point where they described their situation as unbearable.¹⁹

This is not a minor footnote to the medical story. Chronic pelvic pain, especially when its cause takes years to diagnose, can erode every part of a person’s life: relationships, employment, sleep, mental health. If you are experiencing mesh-related complications and struggling emotionally, that response is well-documented and you are not alone in it. Mental health support should be part of the treatment plan, not an afterthought.

The Regulatory Backdrop

The broader conversation around sling failure exists against a regulatory backdrop that has shaped clinical practice. In 2011, the FDA issued a safety communication about surgical mesh used in transvaginal repair of pelvic organ prolapse, warning that serious complications were not rare. That communication was specifically about mesh for prolapse, not about midurethral slings for stress incontinence, which the FDA continued to regard as having a different risk profile. Even so, the warning had a ripple effect. A survey of urogynecologists found that while sling use for incontinence did not officially change in the immediate aftermath of the announcement, the broader anxiety about mesh did influence practice patterns.²⁰

Population-level data told a sharper story. Despite the FDA communication targeting only prolapse mesh, there was a significant decrease in the use of synthetic midurethral slings in the years that followed.²¹ Whether that decline improved patient outcomes overall or caused some women to miss out on a procedure that would have helped them is still debated. The midurethral sling remains a standard treatment for stress incontinence and is generally considered effective for the majority of patients. But the public wariness generated by mesh-related lawsuits and FDA warnings has made many women hesitant, and it has placed more weight on thorough preoperative counseling about both the benefits and the realistic range of potential complications.

Finding the Right Specialist

If you suspect your sling has failed or is causing complications, the type of doctor you see matters. A general gynecologist or urologist can evaluate the basics, but complex mesh-related problems often require a urogynecologist or a pelvic floor specialist with experience in revision surgery. As the surgeon-volume data makes clear, experience with these specific procedures correlates with better outcomes. Asking how many sling procedures and sling revisions a surgeon performs each year is a perfectly appropriate question.

Pelvic floor physical therapy also deserves mention as a treatment that frequently appears in the management plan regardless of whether surgery is needed. For women with milder symptoms after sling failure, or for those who have residual symptoms after sling revision or removal, pelvic floor rehabilitation can address muscle dysfunction and improve bladder control without additional surgery. It is not a replacement for addressing a mechanical sling problem, but it is a consistently useful part of the recovery toolkit.