Navel piercing is generally carried out on the upper rim of the navel which acts as a support for the jewel which passes through it vertically. This is one of the most common piercings among young people and, in particular, girls. There are various derivatives and variations of navel piercing, one of which goes through the lower rim instead of the upper.Others consist of several jewels around the navel forming a triangle, for instance, or a kind of cross.