Stinky navel is not necessarily cancer, need to analyze for specific reasons. Smelly navel may be physiological factors, such as not pay attention to hygiene and cleanliness, may also be pathological reasons, such as umbilical cord infection, eczema, umbilical ureter tumor, etc., need to timely examination and symptomatic treatment. If it is physiological factors, such as not pay attention to hygiene and cleanliness, you need to regularly clean, do not use unclean hands to touch the navel, to avoid bacterial growth. If it is a pathological cause of umbilical cord inflammation, you need to differentiate the treatment for the degree of inflammation, mild cases need to be cleaned and disinfected locally, and severe cases need to be treated with systemic antibiotics under the guidance of a doctor. If the cause of eczema is pathologic, it is necessary to find the cause of the disease, control the symptoms, and reduce the recurrence of the disease, and the treatment modalities include local treatment, physical therapy, and traditional Chinese medicine treatment. If it is a pathological cause of umbilical ureteral tumor, it is necessary to carry out timely examination and active treatment.