Belly button with fecal odor may not pay attention to hygiene or caused by umbilical cord infection. 1. Do not pay attention to hygiene: such as obesity, the navel did not wash in time, the accumulation of local dirt may cause the navel with the smell of shit. It is recommended to pay attention to hygiene, diligent bathing, diligent change of clothing, most will be relieved. 2. Umbilical cord infection: the navel area of the secretion is not timely cleaned, may cause bacterial infection, resulting in umbilical cord infection, which produces a sour odor, the smell of shit, there may also be red, swollen, painful, itchy, oozing and other symptoms of the navel. After the emergence of umbilical infection should be promptly cleaned up secretions, routine disinfection and then treated with topical antibiotic ointment under the guidance of a physician. Belly button smell of feces may also be related to other reasons, need to go to the hospital in time to check, under the guidance of a professional physician to clarify the cause of the disease, and comply with the doctor’s instructions for treatment.