Frequent urination in a 5-year-old girl may be caused by drinking too much water, urethritis, cystitis and other factors. 1. Drinking too much water: the bladder capacity of a 5-year-old girl is small, due to drinking too much water will lead to a buildup of urine in the bladder, and the amount of urine each time is small, resulting in frequent urination. You can appropriately reduce the amount of water consumed and urinate in a timely manner. 2. Urethritis: usually due to factors such as holding urine for a long time, not paying attention to pubic hygiene, leading to bacteria into the urethra and triggered by urethritis, when the inflammation stimulates the urethral mucosa, the phenomenon of frequent urination will occur. 3. cystitis: usually due to low immunity, contact with unclean environment, leading to bacteria through the urethra into the bladder, thus triggering cystitis, inflammation stimulation may cause frequent urination phenomenon. 5-year-old girl urinary frequency may also be caused by other factors, should promptly seek medical attention to identify the cause of targeted treatment. Usually pay attention to vulvar hygiene, drink a moderate amount of water, change underwear, avoid bacterial infection.