2 year old child belly button bulging out to consider is due to umbilical infection, umbilical hernia and other diseases caused. 1. Umbilical inflammation: when staphylococcus aureus, Escherichia coli, hemolytic streptococcus and other bacterial infections in the umbilical cord of a 2-year-old child, umbilical inflammation can be triggered, resulting in the child’s umbilical cord and umbilical cord skin redness and swelling, and can be accompanied by pus secretion, the condition of the seriousness, the phenomenon of the umbilical cord bulging out. 2. Umbilical hernia: 2-year-old children can be due to umbilical atresia or umbilical scar tissue is too weak, resulting in increased intra-abdominal pressure (such as crying, constipation, etc.), the occurrence of umbilical hernia, resulting in the child’s navel protrudes from the reproducible mass, to the child quiet, part of the mass can disappear. 2-year-old child belly button bulging out, there may be other reasons, it is recommended to go to the hospital in time to improve the examination to clarify the cause of the disease, under the guidance of the doctor to give targeted treatment or treatment.