The navel has a foul odor of feces considered for bacteria and other causes of navel infection, umbilical fistula and other causes. 1. Navel infection: such as bacteria, fungi, viruses, parasites and other factors cause acute and chronic inflammation of the navel, further development can be accompanied by the formation of umbilical abscesses, touching the fluctuating sense. Local skin redness, swelling, heat and pain and have a stool odor, but also cause abdominal pain, abdominal distension, diarrhea and other abdominal discomfort, but also with fever, chills and other systemic symptoms. 2. Umbilical intestinal fistula: can be congenital, in the navel and the small intestine between the intestinal tube is not closed or acquired infection caused by the intestinal tract in the umbilicus fistula, position change, increased intra-abdominal pressure and other circumstances, can cause intestinal contents from the umbilicus outflow, the smell of shit, and can cause local infection and other symptoms, such as abdominal pain, nausea. The navel has a smell of shit is recommended to consult a doctor in order to clarify the diagnosis, under the guidance of the doctor for targeted treatment.