Poor hygiene, for example, in children who are potty-training.Structural problems in the urinary tract, such as enlarged prostate.Age (older adults and young children are more likely to get UTIs).For example, menopause or the use of spermicides can cause these bacterial changes. Changes in the bacteria that live inside the vagina, or vaginal flora.Other factors that can increase the risk of UTIs: This makes it easier for bacteria to enter the urinary tract. UTIs are more common in females because their urethras are shorter and closer to the rectum. Some people are at higher risk of getting a UTI. They’re less common, but more serious than bladder infections. Kidney infection (pyelonephritis) is another type of UTI. The infections can affect several parts of the urinary tract, but the most common type is a bladder infection (cystitis). UTIs are common infections that happen when bacteria, often from the skin or rectum, enter the urethra, and infect the urinary tract. Your healthcare professional can determine if you have a UTI and what antibiotic you need.