Cystitis is a type of urinary tract infection that causes inflammation in the bladder. The infection is typically caused by bacteria that normally exist within the gastrointestinal tract. After stool is passed, some microorganisms continue to linger around the anus. Sometimes these bacteria make it to the bladder by passing through the urethra. Because they tend to thrive in the environment created by urine, it is not unusual for them to multiply quickly and cause an infection as they sit in the bladder. Less commonly, the condition can also be caused by exposure to certain chemicals or radiotherapy.
Cystitis occurs far more frequently in women than men because the female urethra is shorter and is located closer to the anus. In addition