What Is Interstitial Cystitis?
Interstitial cystitis, often grouped with bladder pain syndrome as IC/BPS, is a chronic condition involving bladder-related pain, pressure, or discomfort and urinary symptoms without a simple explanation such as a typical bacterial UTI.
Overview
IC/BPS varies widely. Some people have persistent symptoms; others experience flares and quieter periods. Symptoms can overlap with urinary infection, overactive bladder, endometriosis, vulvodynia, prostatitis, pelvic-floor dysfunction, and other conditions, so evaluation matters.
Common symptoms
Symptoms may include bladder or pelvic pain, pressure, discomfort as the bladder fills, urinary urgency, frequent urination, nighttime urination, and pain with sex. Not everyone has every symptom.
Possible causes and contributing factors
No single cause explains every case. Research considers changes in bladder lining or signaling, inflammation, nerve sensitivity, pelvic-floor dysfunction, immune processes, prior injury or infection, and overlapping pain conditions. These are areas of investigation, not a universal explanation.
How IC differs from a UTI
A bacterial UTI is generally identified through symptoms plus urine testing and may respond to antibiotics. IC/BPS symptoms can feel similar, but routine cultures do not show a typical infection. New or changed symptoms still need evaluation because people with IC can also develop UTIs.
Diagnosis and treatment overview
There is no single test that confirms every case. Clinicians review history, symptoms, examination, urine testing, and selected additional tests to rule out other causes. Treatment is individualized and may combine education, self-management, pelvic-floor therapy, medicines, bladder treatments, procedures, and pain care.
When to seek medical care
Arrange medical evaluation for persistent bladder pain, urgency, or frequency. Seek urgent help for inability to urinate, fever with urinary symptoms, severe flank pain, heavy blood in urine, pregnancy-related urinary concerns, or rapidly worsening illness.