The umbilical cord of newborns usually falls off in 7-10 days. If the umbilical cord has not fallen off in 20 days, whether it is normal or not needs to be analyzed based on the absence of symptoms such as oozing, bleeding, obvious redness and swelling in the umbilicus and its surrounding area and whether it is properly cared for. If the umbilical cord has not fallen off after 20 days and there is no oozing, bleeding, obvious redness or swelling in the umbilicus and its surrounding area, it may be due to improper parental care, or the umbilical cord may not be tied tightly enough, or the stump may not be completely ischemic and necrotic due to a decrease in the elasticity of the rubber band used to tie the umbilical cord, which is basically normal. In addition, if the child’s own belly button develops thicker, it will also not fall off easily. However, if there is oozing, bleeding, obvious redness and swelling in the umbilicus and around the umbilicus, you need to seek medical treatment promptly. When the umbilical cord is not completely shed, parents should insist on good umbilical care and disinfection, especially when helping the baby to dress and undress carefully to avoid scraping the ligature stump of the umbilical cord. Also, do not artificially peel off the ligature head of the umbilical cord, but let it fall off naturally to avoid infection.