If the umbilical cord does not fall off, it can usually fall off by itself if there is no pus symptom, and local treatment is needed if there is pus. 1. No pus: just simple umbilical cord does not fall off, but the local area has been crusted, no pus, redness and swelling and other symptoms, it is recommended to observe for a period of time, the case can generally fall off on its own, without special treatment. 2. Suppuration: If the surrounding inflammation causes suppurative reaction, resulting in localized liquid exudation affecting the umbilical cord detachment, the wound should be scrubbed with iodophor as soon as possible to prevent secondary infection, and the umbilical cord will be detached when the localized scabs are formed. For those with more serious suppuration, re-tieing is required. The umbilical cord has not fallen off as far as possible do not take the initiative to deal with, need to go to the hospital, under the guidance of a professional physician targeted treatment, so as not to cause acute infection due to improper treatment.