Baby navel odor may be related to physiological factors such as improper cleaning, but also may be related to pathological factors such as inflammation or infection of the umbilical cord. 1. physiological factors: due to a long time not clean the baby’s umbilicus, storage of a large amount of dust, shed dander, etc., when mixed with sweat, urine and other bodily fluids, there may be a baby bellybutton stinky situation. 2. Pathological factors: due to the baby umbilical cord infection, can lead to the emergence of baby navel odor, it is recommended to give the baby during or after the bath navel to avoid accumulation of water. Baby navel odor, there may be other reasons, it is recommended to go to the hospital in a timely manner, improve the examination to clarify the cause, under the guidance of the doctor to give targeted treatment or treatment.