If the newborn’s belly button becomes septic, it is mainly due to umbilicus caused by bacterial infection. This condition is often caused by a newborn’s belly button not being disinfected properly, which leads to the growth of bacteria, especially septic bacteria. The child often has pus in the navel, accompanied by red, swollen and painful skin, and some children also have fever, neonatal jaundice, poor mental status, neonatal pneumonia and other signs of infection. In this case, parents need to promptly disinfect the child’s belly button. Parents can use iodophor and alcohol for local disinfection. In addition, after disinfection, you can apply Bactrim to your child for local anti-infection treatment. If the child’s systemic symptoms are severe, such as poor mental status, sepsis and fever, cephalosporin should be administered intravenously in a timely manner.