What causes urinary tract infections?

For various reasons, urinary tract infections (UTIs) are very common in young women. First is the short length of the urethra (tube connecting bladder to the exterior). This facilitates bacteria to easily enter the urinary bladder. Another is the dampness in the pelvic region during menstrual periods. Bacteria can enter the genitals and pass on to the urinary bladder during sexual activity.
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Dr. Rachna Pande