There are many reasons for the enlargement of the female navel, such as obesity, localized infections, umbilical hernia and other reasons. 1. Body obesity: due to obesity, abdominal fat accumulation, may lead to girls navel deeper, bigger and other changes in appearance. 2. Localized infection: various causes of irritation caused by umbilical cord infection caused by umbilical cord, can also lead to the umbilical cord of the red, swollen and painful, oozing pus and other manifestations, caused by the girls belly button child enlargement. 3. Umbilical hernia: navel part of the abdominal wall is weak, intra-abdominal pressure increases, abdominal contents may be protruding from the navel, will also cause the phenomenon of girls navel enlargement. Girls navel enlargement there may be other reasons, need to go to the hospital first check, clear cause of treatment as prescribed by the doctor.