Urinary tract infections, or UTIs, occur when bacteria enter the urinary tract via the urethra and then multiply inside the bladder or the urethra itself, according to Mayo Clinic. The short distance from the anus to the urethra makes women prone to bacteria entering the gastrointestinal tract.
Other ways to get a UTI, according to Womenshealth.gov, include wiping from back to front following a bowel movement, waiting too long before emptying the bladder when one gets the urge and using a diaphragm as birth control. The bacteria are often spread during sexual intercourse, so having sex increases the risks of a UTI. Women who suffer from diabetes, who have a diminished level of estrogen or who wear catheters are more prone to a UTI.