Chronic Bladder Pain Syndrome (Interstitial Cystitis)
Interstitial cystitis, now more often called bladder pain syndrome (the two terms are used together as "IC/BPS") is chronic pelvic and bladder pain or pressure, alongside urinary urgency or frequency, that persists without an infection or other clear cause on standard testing. It's genuinely underdiagnosed — symptom overlap with UTIs and overactive bladder means it's often mistaken for one or the other for years before the actual diagnosis, similar to the diagnostic delay seen with endometriosis.
Last updated August 2026
How it's different from a UTI or overactive bladder
A UTI shows a positive urine culture; IC/BPS doesn't — by definition, infection has been ruled out. Overactive bladder is primarily about urgency and frequency without pain as a core feature; IC/BPS centers on pain or pressure that often specifically worsens as the bladder fills and eases (at least partially) after urinating. It's common to have been treated repeatedly for "recurrent UTIs" with negative cultures before IC/BPS is actually considered.
What it's often connected to
IC/BPS frequently overlaps with other chronic pain conditions — endometriosis, irritable bowel syndrome, fibromyalgia, and vulvodynia (chronic vulvar pain) all show up together with IC/BPS more often than chance would explain, which has led researchers toward a "central sensitization" explanation: the nervous system itself becomes more sensitive to pain signals over time, not just the bladder tissue in isolation. That's part of why treatment often needs to look beyond the bladder alone.
How it's diagnosed
There's no single definitive test — diagnosis is mainly clinical, based on your symptom pattern plus ruling out infection (urine culture), and, when there's a reason for concern, ruling out bladder cancer or other conditions via cystoscopy. Cystoscopy with hydrodistension (stretching the bladder with fluid under anesthesia) can support the diagnosis and occasionally reveals "Hunner's lesions" — a specific finding present in a minority of patients that changes the treatment approach — but it isn't required for everyone to get a working diagnosis and start treatment.
Treatment starts with self-management, not medication
First-line treatment is education and self-care: identifying and avoiding your personal dietary triggers (common culprits include caffeine, alcohol, citrus, spicy food, carbonated drinks, and artificial sweeteners, though triggers are genuinely individual — an elimination-and-reintroduction approach helps identify your own), stress management, and simple bladder habit changes. This isn't a dismissive "just manage it yourself" — it's the actual first rung of the standard treatment ladder, and many people get meaningful relief here alone.
Pelvic floor therapy — but not the strengthening kind
This is the detail most often gotten wrong: unlike incontinence, where pelvic floor strengthening (Kegels) helps, IC/BPS often involves an overly tense, overactive pelvic floor — strengthening exercises can make pain worse, not better. What actually helps is manual pelvic floor physical therapy focused on releasing and relaxing those muscles, done by a therapist specifically experienced with pelvic pain, not general strengthening protocols.
Medications and further options
Oral options include amitriptyline and hydroxyzine, both used off-label at doses lower than for their original purposes; pentosan polysulfate sodium (Elmiron) is FDA-approved specifically for IC/BPS but carries a recognized risk of retinal changes with long-term use, so regular eye exams are part of monitoring if you're on it. Bladder instillations — medication delivered directly into the bladder through a catheter — are another option when oral treatments aren't enough. For the subset of patients with Hunner's lesions specifically, direct treatment of those lesions (fulguration or steroid injection) is its own effective pathway. Neuromodulation options similar to those used for overactive bladder exist here too for more refractory cases.
Worth discussing with your provider
Educational information only — general patterns that vary by person. This is not medical advice, a diagnosis, or a substitute for care from your own clinician.
More from Education