When the umbilical cord of a newborn baby is first detached, the root of the navel may appear to be oozing blood and water, which is normal and the wound will slowly heal like a normal wound. So how is the bleeding umbilical cord caused in newborns? There may be the following reasons: 1, umbilical bleeding: when the umbilical cord of a newborn falls off, within a month’s time, if the baby coughs hard or cries excitedly, it will lead to abdominal distension, so that the residual end of the umbilical cord within the blood vessels slightly open, the situation of blood oozing. 2. Umbilical cord granuloma: After the umbilical cord is cut, the wound is not healed and stimulated by a foreign body, and a small polyp-like granuloma will form in the cut umbilical cord wound. The manifestation is a cherry-red swelling in the umbilicus, like a rice-grain to soybean-sized tissue, with thick, bloody secretions, contaminating clothes and pants, which does not heal over time. 3, umbilical eczema: newborns suffer from eczema in not a few cases, some of the baby eczema will grow in the navel. Eczema at the navel may lead to skin erosion, secretions sometimes more and less. 4, umbilical velvet: is the residue of the mucous membrane of the newborn umbilicus. The appearance of the umbilical velvet is very much like a piece of pink meat, located in the center of the navel, more secretions, care when not careful to touch it will have a small amount of bloody secretions. 5. Umbilical infection: The inwardly sunken belly button is considered a “hygiene corner” and is particularly prone to accumulating dirt or water, so it becomes a favorite environment for bacteria. In addition, after the umbilical cord has fallen off, the umbilical stump is not completely closed and there is no skin coverage, so if the umbilical cord is not properly cared for, bacteria can grow and multiply in the umbilical cord and cause umbilitis. Overall, most newborn belly button bleeding is the result of improper care after cutting the umbilical cord. Parents should learn more and disinfect the newborn’s belly button in time to avoid more serious bacterial infections in the face of bleeding.