If a newborn baby’s navel is red and smelly, it could be caused by an umbilical infection. Umbilicitis is an acute inflammation caused by the invasion and multiplication of bacteria in the umbilical stump. In mild cases, the umbilical chakra and the skin around the umbilicus are mildly red and swollen, and can be accompanied by a small amount of plasma-purulent discharge. In severe cases, the umbilicus and periumbilical area are obviously red, swollen and hard, and the secretion is purulent and copious, often with a foul odor, which can spread to the surrounding skin and tissues to cause cellulitis, peritonitis and sepsis of the abdominal wall. Normal newborns can have bacterial growth in the umbilicus after birth, and a positive culture of local secretions does not indicate the presence of infection, but must have signs of inflammation in the umbilicus, which should be differentiated. If the simple manifestation of the umbilical chakra is red, without yellow purulent secretion, it is recommended to try to keep the local dry, especially when bathing, do not enter the water, the baby must be cleaned in a timely manner after urination and defecation. Can use 2% iodine and 75% alcohol cleaning, 2-3 times a day, serious with yellow purulent discharge is more, must go to the neonatology clinic, the need for infusion treatment.