Thank you for the query.
Such symptom can be caused by persistent urachus, which connects fetal cord with fetal urinary bladder
. Usually it degenerates after a birthday, however in some cases it does not. It gives discharges from the belly button and urinary tract
In some cases umbilical hernia
can give such symptoms as well.
It is advisable for you to have abdominal ultrasound
to have it checked. Urine analysis is advisable as well.
Hope this will help.