There are several cases of belly button secretion: 1, umbilical infection, umbilical infection is mostly seen in trauma, recent scratching or something else touching the formation of infected lesions, it will be accompanied by redness and pain of the surrounding skin, and there will be a small amount of purulent secretions. 2, seen in the umbilical diseases, umbilical diseases are mostly seen in a disease called umbilical velvet, it is a congenital disease, the main symptom is the umbilical outflow of some It is a congenital disease, and the main symptom is some yellowish liquid coming out of the umbilicus, and a small amount of patients will have a bad taste and odor. The treatment of umbilical cord velvet is mainly surgical, and the umbilical cord velvet area can be removed. In a few cases, the umbilical canal is not closed, or the umbilicus has been operated.