Belly button water to consider the following three conditions: 1, umbilical ureteral fistula, embryonic development period if the ureteral development is incomplete, it may not be completely closed, there will be periodic navel drip urine. This condition is a congenital disease, if not as a child can basically be ruled out; 2, sebaceous cysts, that is, the accumulation of subcutaneous oil blocking the sebaceous glands after the cysts. The most common cause of this phenomenon is the lack of attention to umbilical hygiene and the frequent use of hands to pick the navel. If you have umbilitis, do not get wet, or the umbilicus does not get a good dry, to do a daily wipe with iodophor to keep the umbilicus hygienic and dry.