Interstitial cystitis, also called painful bladder syndrome, is an inflammation of the bladder wall. It causes symptoms like those of a urinary tract infection, such as pain and burning during urination. However, there are no bacteria in the urine. To diagnose this condition, your doctor may do a test (cystoscopy) that uses a thin, lighted tube to see the inside of the bladder. The majority of cases occur in women.

No cure has been found for this condition, but treatment, such as pentosan polysulfate sodium (Elmiron), can relieve symptoms.