If you're a woman, your chance of getting a urinary tract infection, or UTI, is high; some experts rank your lifetime risk of getting one as high as 1 in 2 -- with many women having repeat infections, sometimes for years on end. Here's how to handle UTIs, whether you're experiencing your first or fifth infection, and how to make it less likely you'll get one in the first place.
What Causes UTIs in Women
UTIs are a key reason we're often told to wipe from front to back after using the bathroom. That's because the urethra -- the tube that transports urine from the bladder to the outside of the body -- is located close to the anus. Bacteria from the large intestine, such as E. coli, are in the perfect position to escape the anus and invade the urethra. From there, they can travel up to the bladder, and if the infection isn't treated, continue on to infect the kidneys. Women may be especially prone to UTIs because they have shorter urethras, which allow bacteria quick access to the bladder. Having sex can introduce bacteria into the urinary tract, too.
Studies on the effectiveness of cranberry juice for preventing or treating UTIs have produced mixed results. The red berry contains a tannin that prevents E. coli bacteria - the most common cause of urinary tract infections - from sticking to the walls of the bladder, where they can cause infection. However, a 2012 review of 24 studies looking into the effectiveness of cranberry juice/extract on UTIs found they did not significantly reduce the incidence of UTIs.
About 1 in 5 women experience a second urinary tract infection, while some are plagued incessantly. In most cases, the culprit is a different type or strain of bacteria. But some types can invade the body's cells and form a community safe both from antibiotics and the immune system. A group of these renegades can travel out of the cells, and then re-invade, ultimately establishing a colony of antibiotic-resistant bacteria primed to attack again and again.
Some women are genetically predisposed to UTIs, while others have abnormalities in the structure of their urinary tract that make them more susceptible to infection. Women with diabetes may be at higher risk, as well, because their compromised immune systems make them less able to fight off infections like UTIs. Other conditions that increase risk include pregnancy, multiple sclerosis, and anything that affects urine flow, such as kidney stones, stroke, and spinal cord injury.