The navel is swollen, often due to the following reasons: 1, umbilitis, umbilitis is often caused by long-term non-cleaning of the umbilicus, or repeated violent buckling, rubbing. The lighter umbilicus can be treated with local application of iodophor, or Bactrim and other drugs. If the infection is serious, with obvious redness and oozing, you need to go to the hospital to improve the relevant examination, perform local incision and debridement, followed by regular drug changes, and also need to cooperate with oral antibiotics for treatment, such as cephalosporin antibiotics or penicillin antibiotics, and sometimes also need to carry out infusion treatment. 2, may be caused by umbilical ureteral cyst infection, which is a congenital disease, you need to go to the hospital to check the abdomen The abdominal ultrasound or abdominal CT, imaging, etc. should be clarified. If it is the disease, it needs to be removed surgically as soon as possible, because malignant changes may occur when it exists for a long time, which may endanger life.