Pain, congestion, and edema in the umbilical fossa or circumumbilical region. Often there is a foul-smelling plasma discharge, and examination shows moist umbilical fossa, swelling and tenderness around the umbilicus. In severe cases, pus accumulates in the umbilical fossa with fever, and there may be enlarged lymph nodes in the groin. Occasionally, it may spread to the umbilical periphery and have systemic symptoms with deep infection and cellulitis. Parents must know that it is mostly due to incomplete disinfection of the umbilical care of newborns, bacteria invade and multiply, which in turn causes inflammation. The lack of attention to local hygiene and poor umbilical care leads to bacterial entry. Newborns due to low immunity, usually do not pay attention to personal hygiene, can cause local infection, aggravate the symptoms of the child. Therefore, usually pay attention to keep the local dry, change diapers diligently to prevent the contamination of urine. Diligent local change, with 3% hydrogen peroxide rinse local skin 2 to 3 times, and then use tincture of iodine disinfection, alcohol deiodization, or use gentian violet every day 2 to 3 times, and pay attention to the aseptic operation, so as not to aggravate the infection. If necessary, drainage treatment, systemic application of antibiotics and other treatments.