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PubMed This is a summary of 20 peer-reviewed journal articles Updated
Urology

Is It Really IC? Symptoms and the Diagnostic Journey

At a Glance

Interstitial cystitis (IC/BPS) is diagnosed through a process of elimination after ruling out infections. The hallmark symptom is a pain-filling cycle where bladder pain increases as the bladder fills and drops after urinating. A cystoscopy is often recommended to check for specific lesions.

Determining if you have Interstitial Cystitis/Bladder Pain Syndrome (IC/BPS) can feel like a long process of elimination. Because there is no simple blood test or scan to confirm it, doctors must rely on your reported symptoms and the systematic ruling out of other medical issues [1][2].

The American Urological Association (AUA) defines the condition as an unpleasant sensation (pain, pressure, or discomfort) perceived to be related to the bladder, typically lasting for more than six weeks, in the absence of an infection or other identifiable causes [1][3].

The Hallmark Symptom: The Pain-Filling Cycle

While symptoms vary, the most common sign of IC/BPS is the pain-filling cycle [3]. For most patients, pain and pressure gradually increase as the bladder fills with urine [4]. This discomfort often reaches a peak when the bladder is full and then provides a brief period of relief immediately after voiding (urinating) [3][4].

Common Misdiagnoses

Because the symptoms of IC/BPS are shared with several other conditions, it is frequently misdiagnosed [1][5]. It is common for patients to be told they have:

  • Recurrent UTIs: Many patients are treated with multiple rounds of antibiotics for “infections,” even when urine cultures show no bacterial growth [6][7].
  • Overactive Bladder (OAB): While both cause frequent urination, OAB is usually driven by a fear of leaking (incontinence), whereas IC/BPS is driven by the need to urinate to stop the rising pain or pressure [8][9].
  • Endometriosis: Since both conditions cause chronic pelvic pain, they are often confused or may even occur at the same time [8][10].

Tests You May (or May Not) Need

Diagnostic testing has evolved significantly in recent years. It is important to know which tests are considered standard and which are outdated:

  • Urinalysis and Culture: These are essential first steps to ensure your symptoms aren’t caused by an active bacterial infection or kidney stones [11][12].
  • Potassium Sensitivity Test (PST): This test involves putting a potassium solution into the bladder to see if it causes pain. The AUA no longer recommends the PST [1]. It is often painful for the patient and is not accurate enough to confirm a diagnosis [1].
  • Cystoscopy: This procedure involves inserting a small camera into the bladder [13]. According to the AUA, a cystoscopy is not strictly required for a basic IC/BPS clinical diagnosis in most patients [11][14]. However, there is a critical caveat: many specialists highly recommend an early cystoscopy specifically to rule Hunner lesions in or out [15][16]. Identifying whether you have these specific red, inflamed areas on the bladder wall is often the most important step in choosing the right targeted treatment [17][18]. It is also necessary if your doctor needs to rule out bladder cancer, especially if there is blood in your urine.

The Role of Physical Exams

A physical exam is a critical part of the diagnostic journey. Your doctor should check for pelvic floor tenderness [11]. Many patients with IC/BPS also have pelvic floor dysfunction, where the muscles of the pelvis are constantly tight or in spasm, contributing significantly to the feeling of bladder pain and urgency [19][20].

Common questions in this guide

How is interstitial cystitis different from an overactive bladder?
Overactive bladder is usually driven by a sudden urge to urinate and fear of leaking. In contrast, interstitial cystitis causes a frequent need to urinate in order to relieve rising pain and pressure in the bladder.
Why do I keep getting diagnosed with UTIs when my cultures are negative?
Interstitial cystitis shares many symptoms with urinary tract infections, such as urgency and pelvic pain. If your urine cultures consistently show no bacterial growth, your symptoms may actually be caused by IC/BPS rather than an infection.
Is a cystoscopy required to diagnose interstitial cystitis?
A cystoscopy is not always strictly required for a basic diagnosis of interstitial cystitis. However, many specialists highly recommend it early on to check for inflammatory areas called Hunner lesions and to rule out other bladder conditions.
Do I need a potassium sensitivity test to confirm I have IC?
The potassium sensitivity test was once used to diagnose IC but is no longer recommended by major urological guidelines. It is often unnecessarily painful and not accurate enough to confirm the condition.

Questions to Ask Your Doctor

Curated prompts to bring to your next appointment.

  1. 1.Can you explain how we are distinguishing my symptoms from Overactive Bladder (OAB) or a hidden infection?
  2. 2.Do you recommend a cystoscopy early in my diagnostic process to look for Hunner lesions, even if the AUA doesn't strictly require it?
  3. 3.Why is the Potassium Sensitivity Test no longer recommended, and what are we doing instead to confirm my diagnosis?
  4. 4.Can you check me for pelvic floor muscle hypertonicity (excessive tightness) or refer me to a pelvic floor physical therapist?

Questions For You

Tap a prompt to share your answer — we'll use it plus this page's context to start a tailored conversation.

References

References (20)
  1. 1

    Diagnosis and Treatment of Interstitial Cystitis/Bladder Pain Syndrome.

    Clemens JQ, Erickson DR, Varela NP, Lai HH

    The Journal of urology 2022; (208(1)):34-42 doi:10.1097/JU.0000000000002756.

    PMID: 35536143
  2. 2

    Pathophysiology of interstitial cystitis.

    Birder LA

    International journal of urology : official journal of the Japanese Urological Association 2019; (26 Suppl 1()):12-15 doi:10.1111/iju.13985.

    PMID: 31144735
  3. 3

    The association between vulvodynia and interstitial cystitis/bladder pain syndrome: A systematic review.

    Bosio S, Perossini S, Torella M, et al.

    International journal of gynaecology and obstetrics: the official organ of the International Federation of Gynaecology and Obstetrics 2024; (167(1)):1-15 doi:10.1002/ijgo.15538.

    PMID: 38655714
  4. 4

    Pulsed Electromagnetic Field Therapy as a Complementary Alternative for Chronic Pelvic Pain Management in an Interstitial Cystitis/Bladder Pain Syndrome Patient.

    Overholt TL, Ross C, Evans RJ, Walker SJ

    Case reports in urology 2019; (2019()):5767568 doi:10.1155/2019/5767568.

    PMID: 31949970
  5. 5

    Integrative Diagnostic Model Combining Urinary Biomarkers and Clinical Parameters to Improve Diagnostic Performance in Interstitial Cystitis/Bladder Pain Syndrome.

    Chen YC, Tian JH, Kuo HC

    European urology open science 2025; (82()):192-200 doi:10.1016/j.euros.2025.10.021.

    PMID: 41322958
  6. 6

    The enigma of men with interstitial cystitis/bladder pain syndrome.

    Arora HC, Shoskes DA

    Translational andrology and urology 2015; (4(6)):668-76 doi:10.3978/j.issn.2223-4683.2015.10.01.

    PMID: 26813678
  7. 7

    Complementary and alternative medical therapies for interstitial cystitis: an update from the United States.

    Atchley MD, Shah NM, Whitmore KE

    Translational andrology and urology 2015; (4(6)):662-7 doi:10.3978/j.issn.2223-4683.2015.08.08.

    PMID: 26816868
  8. 8

    Current Therapeutic Strategies in Clinical Urology.

    Crane A, Isharwal S, Zhu H

    Molecular pharmaceutics 2018; (15(8)):3010-3019 doi:10.1021/acs.molpharmaceut.8b00383.

    PMID: 29924627
  9. 9

    Serum anandamide and lipids associated with linoleic acid can distinguish interstitial cystitis/bladder pain syndrome from overactive bladder: An exploratory study.

    Torimoto K, Ueda T, Gotoh D, et al.

    Lower urinary tract symptoms 2023; (15(6)):238-246 doi:10.1111/luts.12501.

    PMID: 37688290
  10. 10

    Laser Treatment for Patients With Vulvodynia and Interstitial Cystitis/Bladder Pain Syndrome: A Case Series (The UNICORN-3 Study).

    Okui N, Okui MA, Kouno Y, Nakano K

    Cureus 2023; (15(7)):e41786 doi:10.7759/cureus.41786.

    PMID: 37449291
  11. 11

    Cystoscopic evaluation and clinical phenotyping in interstitial cystitis/bladder pain syndrome

    Acar Ö, Tarcan T

    Journal of the Turkish German Gynecological Association 2019; (20(2)):117-122 doi:10.4274/jtgga.galenos.2018.2018.0102.

    PMID: 30457110
  12. 12

    Interstitial Cystitis/Bladder Pain Syndrome (IC/BPS) Diagnosis: Current Limitations and a Pragmatic Clinical Diagnostic Definition.

    Werneburg GT, Moldwin R, Lowell Parsons C, et al.

    Neurourology and urodynamics 2026; (45(1)):32-38 doi:10.1002/nau.70112.

    PMID: 40626422
  13. 13

    Clinical guidelines for interstitial cystitis/bladder pain syndrome.

    Homma Y, Akiyama Y, Tomoe H, et al.

    International journal of urology : official journal of the Japanese Urological Association 2020; (27(7)):578-589 doi:10.1111/iju.14234.

    PMID: 32291805
  14. 14

    Unraveling the complexity of bladder-centric chronic pain by intravesical contrast enhanced MRI.

    Tyagi P, Maranchie J, Dhir R, et al.

    Continence (Amsterdam, Netherlands) 2023; (7()) doi:10.1016/j.cont.2023.101041.

    PMID: 40575723
  15. 15

    The diagnostic and therapeutic efficacy of cystoscopy with hydrodistension and random biopsies in clinically suspected interstitial cystitis/bladder pain syndrome.

    Chen Y, Ying Z, Xiao Y, et al.

    European journal of obstetrics, gynecology, and reproductive biology 2021; (265()):156-161 doi:10.1016/j.ejogrb.2021.08.025.

    PMID: 34492610
  16. 16

    Interstitial Cystitis/Bladder Pain Syndrome in Men.

    Snipes M, Whitman W, Pontari M, et al.

    Neurourology and urodynamics 2026; (45(1)):26-31 doi:10.1002/nau.70103.

    PMID: 40605567
  17. 17

    Phenotyping of interstitial cystitis/bladder pain syndrome.

    Akiyama Y, Hanno P

    International journal of urology : official journal of the Japanese Urological Association 2019; (26 Suppl 1()):17-19 doi:10.1111/iju.13969.

    PMID: 31144756
  18. 18

    Interstitial cystitis/bladder pain syndrome: The evolving landscape, animal models and future perspectives.

    Akiyama Y, Luo Y, Hanno PM, et al.

    International journal of urology : official journal of the Japanese Urological Association 2020; (27(6)):491-503 doi:10.1111/iju.14229.

    PMID: 32246572
  19. 19

    Correlates of 1-Year Change in Quality of Life in Patients with Urologic Chronic Pelvic Pain Syndrome: Findings from the Multidisciplinary Approach to the Study of Chronic Pelvic Pain (MAPP) Research Network.

    Clemens JQ, Stephens-Shields AJ, Newcomb C, et al.

    The Journal of urology 2020; (204(4)):754-759 doi:10.1097/JU.0000000000001080.

    PMID: 32294397
  20. 20

    Prevalence of Overactive Bladder Symptoms Among Women With Interstitial Cystitis/Bladder Pain Syndrome.

    Dubinskaya A, Tholemeier LN, Erickson T, et al.

    Female pelvic medicine & reconstructive surgery 2022; (28(3)):e115-e119 doi:10.1097/SPV.0000000000001166.

    PMID: 35272344

This page explains interstitial cystitis symptoms and diagnosis for educational purposes. Always consult a urologist or healthcare provider for an accurate medical diagnosis tailored to your specific symptoms.

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