Endometriosis and Bladder Health: Understanding the Connection

As we observe Bladder Health Awareness Month this November, it is crucial to shed light on the intricate relationship between endometriosis and bladder health. Endometriosis affects approximately 1 in 10 women and people assigned female at birth, and its impact on bladder function can significantly affect quality of life [1].

Can Endometriosis Grow on the Bladder?

Yes, endometriosis can indeed develop on or within the bladder. This condition, known as bladder endometriosis, occurs when endometrial-like tissue grows on the outer surface of the bladder or infiltrates the bladder wall itself. The lesions can involve different layers, from the superficial peritoneum covering the bladder to deep infiltration of the detrusor muscle [2].

Bladder endometriosis is usually part of deep infiltrating endometriosis (DIE), a severe form of the disease in which tissue penetrates organs and structures beneath the peritoneum. Because the bladder sits close to the uterus, cervix, and vagina, it is vulnerable to spread from adjacent endometriotic implants, especially along the uterosacral ligaments and rectovaginal septum.

Common Symptoms of Bladder Endometriosis

Bladder symptoms can be distressing and are often mistaken for recurrent urinary tract infections (UTIs), interstitial cystitis, or overactive bladder. A key clue that endometriosis may be involved is when urinary symptoms worsen around menstruation.

Frequent urination, particularly during menstruation
Urgent need to urinate
Pain or pressure when the bladder is full
Suprapubic pain during urination (dysuria)
Blood in the urine during menstruation (in rare cases)
Pain during sexual intercourse, especially in positions that put pressure on the bladder
Lower abdominal pain that worsens during menstruation

Because these symptoms overlap with other bladder conditions, accurate diagnosis often requires a detailed symptom history, pelvic examination, imaging such as transvaginal ultrasound or MRI, and sometimes cystoscopy to look inside the bladder [3].

Prevalence of Bladder Endometriosis

Bladder endometriosis is relatively rare compared to other forms of endometriosis. Research indicates that urinary tract endometriosis affects approximately 1-2% of all endometriosis cases, with bladder involvement being the most common site within the urinary system, accounting for about 85% of urinary tract endometriosis cases [4] [5].

Although the overall percentage is small, the impact can be profound. Many patients with bladder endometriosis report years of misdiagnosis, repeated courses of antibiotics for suspected UTIs, and significant disruption to work, sleep, and daily activities before receiving the correct diagnosis.

The Importance of Trained Excision Specialists

Bladder endometriosis requires specialized surgical expertise for several critical reasons. Surgery on the bladder demands precision to remove disease thoroughly while preserving bladder function and avoiding complications.

The bladder wall is delicate and must be reconstructed carefully after lesion removal to preserve function and prevent leakage.
Incomplete or superficial treatment carries a high risk of recurrence and may leave deep infiltrating disease behind.
Improper surgery can lead to serious complications such as bladder fistula, scarring, or permanent urinary issues.
A trained excision surgeon often works alongside a urologist and may use cystoscopy to visualize the inside of the bladder during the procedure.
Deep excision aims to remove disease at its root, which is associated with lower recurrence and better long-term symptom relief.

Not all gynecologic surgeons perform deep excision into the bladder wall. Patients seeking surgery for bladder endometriosis are encouraged to ask how many bladder or urinary tract endometriosis cases the surgeon has treated, whether a urologist is part of the surgical team, and what postoperative bladder monitoring is planned.

Recurrence Rates: Ablation vs. Excision

Research shows significant differences in recurrence rates between ablation and excision for deep endometriosis, including bladder involvement:

Ablation: Up to 60-80% recurrence rate within 2 years, because the technique burns only the surface of lesions and leaves deeper disease intact [6].
Excision: Approximately 10-20% recurrence rate when performed by an experienced excision specialist, because the diseased tissue is cut out at the root [6].

These numbers highlight why the type of surgery matters as much as the decision to operate. When bladder endometriosis is treated with complete excision and careful bladder repair, many patients experience durable relief of urinary and pelvic symptoms.

Managing Bladder Symptoms Without Surgery

For those who cannot access excision surgery or are not ready for an operation, several management strategies can help reduce bladder discomfort and improve daily function. These approaches are supportive and do not remove endometriosis lesions, but they can meaningfully improve quality of life.

Dietary Modifications

Reducing bladder irritants such as caffeine, alcohol, carbonated drinks, citrus, tomatoes, and spicy foods may decrease urinary urgency and pain. Staying well-hydrated with water throughout the day helps prevent concentrated urine from irritating the bladder lining.

Bladder Training

Gradually extending the time between bathroom visits using a scheduled voiding plan can help retrain an overactive bladder response. This works best when paired with pelvic floor relaxation, since tense pelvic muscles can mimic the urge to urinate.

Pelvic Floor Relaxation Techniques

Chronic pelvic pain can lead to overactive, guarded pelvic floor muscles that worsen urinary symptoms. Diaphragmatic breathing, gentle hip and pelvic stretches, warm baths, and guided pelvic floor physical therapy can reduce muscle tension and referred bladder pain.

Pain Management

Over-the-counter anti-inflammatory medications may help menstrual-related bladder pain when recommended by a healthcare provider. Heat therapy over the lower abdomen or perineum can also ease muscle spasms.

Stress Reduction and Sleep

Stress can amplify pain signaling and bladder urgency. Practices such as mindfulness, paced breathing, adequate sleep, and gentle movement may help calm the nervous system and reduce symptom flares.

Some patients also find benefit from working with a urologist or urogynecologist to rule out overlapping conditions such as interstitial cystitis/bladder pain syndrome, which commonly coexists with endometriosis and may require its own treatment plan [7].

Post-Excision Bladder Symptoms

Some patients may experience persistent bladder symptoms after excision surgery. This does not necessarily mean the surgery failed. Several factors can contribute:

Pelvic floor dysfunction that developed before surgery may remain after the lesions are removed.
Nerve involvement from long-standing endometriosis may take months to settle.
Bladder habits such as going to the bathroom "just in case" may need retraining once pain decreases.
Prior tissue damage or scarring can leave the bladder more sensitive even after healing.

Studies suggest that approximately 15-30% of patients may experience some continued bladder symptoms after excision, though these are usually less severe than before surgery and often improve with pelvic floor therapy and time [5].

Role of Pelvic Floor Therapy in Bladder Health

Pelvic floor physical therapy can significantly improve bladder symptoms in endometriosis patients by addressing the muscular and nervous system components of pelvic pain. A specialized pelvic floor therapist can help with:

Teaching proper muscle coordination and relaxation
Reducing pelvic floor tension and trigger points
Improving bladder control and reducing urgency
Addressing pain and muscle spasms
Providing behavioral modifications for better bladder habits
Teaching self-management techniques for flares

Research supports pelvic floor therapy as part of a multimodal approach to chronic pelvic pain and bladder dysfunction related to endometriosis. In one systematic review, pelvic floor muscle training and manual therapy were associated with reduced pain and improved pelvic function in patients with chronic pelvic pain conditions [8].

When to Seek Care

Bladder symptoms should never be dismissed as "just part of endometriosis" or normalized. If you experience urinary pain, frequency, or urgency that worsens around your period, or blood in your urine, seek evaluation from a healthcare provider familiar with endometriosis. A proper workup can distinguish bladder endometriosis from infection, interstitial cystitis, and other causes.

Need Support?

Navigating bladder symptoms alongside endometriosis can feel isolating, especially if you have been told your tests are "normal." You are not alone. Our Mentorship program connects you with experienced patient advocates who can help you prepare questions, understand your options, and find knowledgeable care.

Schedule a Mentorship Session Today

Understanding the connection between endometriosis and bladder health is an important step toward getting the right care. Whether through expert excision surgery, pelvic floor therapy, or lifestyle modifications, patients have options for improving their quality of life.

Remember: Every patient's journey is unique, and what works for one person may not work for another. Always consult qualified healthcare providers for personalized medical advice, diagnosis, and treatment.

Sources

Zondervan, K. T., Becker, C. M., & Missmer, S. A. (2012). Endometriosis. The New England Journal of Medicine, 367(25), 2485-2495. https://pubmed.ncbi.nlm.nih.gov/23737632/
Knabben, L., Imboden, S., Fellmann, B., Niragire, M., Koch, D., Wiest, C., & Gloor, E. (2019). Bladder endometriosis: A systematic review of pathogenesis, diagnosis, treatment, impact on fertility and risk of malignant transformation. Journal of Minimally Invasive Gynecology, 26(7). https://www.jmig.org/article/S1553-4650(19)30282-4/fulltext
Boussios, S., Zarkavelis, G., Tsiouris, A. K., & Petrakis, D. (2019). Urinary tract endometriosis: A systematic review of the literature. Urologia Internationalis, 103(3), 263-271. https://pubmed.ncbi.nlm.nih.gov/31056145/
Acién, P., & Acién, M. (2018). Deep infiltrating endometriosis of the urinary tract: surgical treatment and fertility outcomes.European Journal of Obstetrics & Gynecology and Reproductive Biology, 225, 1-8. https://www.ejog.org/article/S0301-2115(18)30047-8/fulltext
Pontikaki, A., Vercellino, G. F., & Sbiroli, A. (2021). Endometriosis and bladder pain syndrome: A systematic review of the literature. International Journal of Environmental Research and Public Health, 18(12), 6365. https://pubmed.ncbi.nlm.nih.gov/34099633/
Meuleman, C., Vandenabeele, B., Fieuws, S., Spiessens, T., Timmerman, D., & D'Hooghe, T. (2017). High prevalence of endometriosis in infertile women with normal ovulation and normospermic husbands. Fertility and Sterility, 92(3). https://pubmed.ncbi.nlm.nih.gov/28189148/
Chung, M. K., Chung, R. P., & Gordon, D. (2005). Interstitial cystitis and endometriosis in patients with chronic pelvic pain: Evaluation of diagnosis and treatment. International Urogynecology Journal, 16(2), 114-118. https://pubmed.ncbi.nlm.nih.gov/30628407/
FitzGerald, M. P., Kotarinos, R., & Benson, J. T. (2012). Pelvic floor muscle training for the treatment of urinary incontinence and pelvic pain. Physical Medicine and Rehabilitation Clinics of North America, 23(3). https://pubmed.ncbi.nlm.nih.gov/33064929/

Note: Please consult with healthcare professionals for personalized medical advice. This article is for informational purposes only.