Drink plenty of liquids, especially water. Drinking water helps dilute your urine and ensures that you ll urinate more frequently — allowing bacteria to be flushed from your urinary tract before an infection can begin. Wipe from front to back. Doing so after urinating and after a bowel movement helps prevent bacteria in the anal region from spreading to the vagina and urethra. Empty your bladder soon after intercourse. Also, drink a full glass of water to help flush bacteria. Avoid potentially irritating feminine products. Using deodorant sprays or other feminine products, such as douches and powders, in the genital area can irritate the urethra. Change your birth control method. Diaphragms, or unlubricated or spermicide-treated condoms, can all contribute to bacterial growth.