Redness in the navel is often caused by umbiliculitis, umbilical ureteral cyst infection, etc., as follows: 1, umbiliculitis: when patients repeatedly violently snap and rub the umbilicus, or when they do not wash for a long time, inflammation of the umbilicus can occur, when the local area will be red, sometimes there will be redness and swelling and breakage, there is liquid outflow, if the symptoms are not too serious, you can locally apply iodophor or Bactrim, etc., during the treatment period try not to If the local infection is very serious, it can be cleaned and changed, but it needs to be treated under the guidance of a doctor; 2. Umbilical ureteral cyst infection: you need to go to the hospital to improve the relevant examination, such as ultrasound, CT or imaging, etc. If the disease is the disease, you need to give anti-inflammatory treatment, and then perform surgery to prevent its long-term existence Malignant transformation occurs.