Umbilical plastic surgery is to make a star-shaped incision in the navel, reshape the shape of the umbilical fossa in the deep after tissue separation, and fix it with rectus abdominis sheath to achieve the purpose of plastic surgery. This kind of operation is more suitable for people who have a protruding navel or a flat navel after delivery and have a desire for beauty. The smaller protruding navel is not suitable for this operation.