The baby navel odor may be due to improper hygiene cleaning, or may be due to diseases such as umbilical cord infection. 1. Improper hygiene and cleanliness: If you do not pay attention to the daily hygiene and cleanliness of the navel, it can lead to the accumulation of dirt, easy to lead to bacterial growth, there will be a stinky navel. If the baby does not appear other uncomfortable symptoms, more normal phenomenon, no need to worry. You should keep your baby’s navel clean, take a shower, but avoid excessive gouging and scratching the navel. 2. Umbilicitis: Umbilicitis is mainly caused by improper disinfection when cutting the umbilical cord, which leads to bacterial invasion of the umbilical cord stump or umbilical broken skin. The child will have redness and swelling of the skin around the umbilicus, and when there is pus discharge from the umbilicus, it may be accompanied by a foul odor. Some children can also be accompanied by crying, anorexia, vomiting, diarrhea, fever and other symptoms. Baby navel odor may also have other reasons, it is recommended to go to the hospital in a timely manner, improve the examination to clarify the cause of the disease, under the guidance of the doctor to give targeted treatment or treatment.