Cystitis is inflammation of the bladder. Under normal conditions, the bladder is resistant to bacterial infection. Anything that disrupts normal passage of urine can damage and lead to irritation of the bladder wall lining, predisposing to inflammation and infection. | Cystitis is inflammation of the bladder. Under normal conditions, the bladder is resistant to bacterial infection. Anything that disrupts normal passage of urine can damage and lead to irritation of the bladder wall lining, predisposing to inflammation and infection. |