Redness in the navel, accompanied by odor, may be the result of infection, foreign bodies, bites, stab wounds, etc., as follows: 1. Infection: is generally indicative of local inflammation, most of which can be seen in the presence of bacterial infection. Some of them can be directly localized with bad operations, such as picking the navel and other causes of skin breakage, secondary to bacterial infection. There are also some underlying diseases, such as the umbilical ureter or umbilical intestinal canal is not closed, this situation may lead to repeated infections. 2, foreign bodies, bites, stab wounds: may be due to local foreign bodies, or what other items bite, stab wounds and so on. Generally, in this case, you need to go to the general surgery department for local debridement and, if necessary, MRI to clarify whether there is an umbilical ureter or umbilical intestinal canal that is not closed. If necessary, surgery may be considered after the inflammation has resolved.