Belly button odor, may be caused by poor personal hygiene, periumbilical inflammation, umbilical ureteric fistula, etc., can be treated by paying attention to personal hygiene, antibiotic treatment and surgery. 1. Poor personal hygiene: some people sweat more, and do not pay attention to personal cleanliness, there may be a belly button odor phenomenon, it is recommended that this part of the population diligently bathe, pay attention to personal hygiene. 2. Periumbilical inflammation: patients with periumbilical inflammation, it is recommended to use iodophor to disinfect the area around the navel, and at the same time take the secretion for drug sensitivity test, get the results of the experiment to choose the appropriate antibiotic treatment, such as penicillin and so on. 3. Umbilical ureteric fistula: patients with umbilical ureteric fistula need to undergo surgical treatment, free umbilical ureter ligation, the patient’s symptoms can be relieved. The above drugs need to be used according to the doctor’s prescription.