Inside the navel is very smelly, the common clinical reasons are mainly the following: First, the navel because of the deep location, the number of daily cleaning significantly reduced, many patients in the shower also can not be local thorough cleaning, which is the most important reason for the odor of the navel. Second, because the navel is cleaned less often, local metabolic waste can be accompanied by a large amount of accumulation, once the combined infection will aggravate the local odor symptoms. Third, the local soft tissues in the navel if accompanied by injury can appear repeatedly flowing pus or purulent infection, which is also an important reason for the formation of heterotopic navel. At this time, patients need to clean the navel as soon as possible metabolic waste, local trauma to remove fluid, pus, strengthen the local anti-infective treatment, local inflammation is completely controlled after the navel odor symptoms can be more quickly relieved.