White trauma at the bottom of the umbilical fossa after the umbilical cord is detached is usually granulomatous hyperplasia, umbilical cord inflammation and abscess formation, which can be treated with medication and scissors trimming. 1. Granulomatous hyperplasia: granulomatous hyperplasia at the bottom of the armpit is due to the wound not healed after umbilical cord severance and the granuloma formed by the stimulation or friction of foreign objects, which can be corroded with 10% silver nitrate solution according to the doctor’s instructions or removed with sterilized scissors, and it is necessary to ensure that the local area is dry and neat. 2. Umbilicitis: Umbilicitis is due to improper treatment of the umbilical cord or disinfection measures after birth and is caused by bacteria such as Staphylococcus aureus, hemolytic streptococcus and other bacterial invasion of the umbilical cord, according to the doctor’s instructions to use penicillin V potassium tablets, benzylpenicillin tablets and other drugs. 3. Abscess: most of the umbilical abscesses are caused by bacteria invading the umbilicus and causing local inflammation, you can use furacilin lotion or levano solution and other drugs according to the doctor’s instructions. After the umbilical cord is detached, when you find white trauma at the bottom of the umbilical fossa, you should consult a doctor in time, go to a regular hospital for examination, and follow the doctor’s instructions to use medication, do not use your own medication, so as not to cause more serious consequences.