Cystitis
Cystitis, in medicine, inflammation of the urinary bladder , usually from bacterial infection originating in the urethra, vagina, or, in more complicated cases, the kidneys (see Urinary System ). Cystitis may also be caused by irritation from crystalline deposits in the urine or from any condition or urologic abnormality that interferes with normal bladder function. Symptoms include painful or difficult urination, urinary urgency, and, in some cases, cloudy or bloody urine. Treatment is primarily with antibiotics.