Adults have a wet and smelly feeling in this part of the navel, considering the localized infection of the navel. Some people do not pay attention to the navel hygiene in daily life, resulting in unclean substances gathered, or often digging deep into the navel caused by navel damage. Or after the bath did not dry the navel in time, resulting in moisture gathering, which led to the navel wet. Due to the hidden location of the navel, the skin has concave folds, anaerobic bacteria bacteria will be easy to gather here and reproduce in large quantities, secondary infection, which will then have a foul odor. Handling can first use the local disinfection of iodine cleaning, slowly will be better. Adults often have wet navel, odor, also need to be alert to a congenital disease, such as umbilical ureteric fistula. However, most of this congenital disease is during the onset of immaturity, a small number of people will be found in adulthood.