Not every navel is pierceable, just like not everyone can get an industrial, or a daith.
This has nothing to do with weight or body type; it only depends on the shape of the navel itself, and how the tissue has settled and developed since the umbilical cord was cut.
Some navel shapes are not suitable for a “traditional” navel piercing but can support what we call a “floating” navel piercing; and some navel shapes are not pierceable at all, or the chances of rejection and scarring are significantly higher than the chances of the piercing healing successfully.
This is because some people’s navels fold in on themselves when they sit down or curl over. Or, the anatomy might be lacking that little ridge or “hood” of tissue that many people have at the top of their navel – this can put undue stress on a piercing and cause the jewellery to press forward and can lead to migration of the piercing, causing it to go crooked, and even as far as causing the piercing to reject entirely.
The difference between a conventional Navel Piercing vs. Floating Navel Piercing is the jewelry: Floating Navel Piercing uses a Flat Disc or Small Bead at the bottom, instead of a large Ball or Gemstone on traditional navel curves. This small change is significant for the comfort of the client as every body moves differently!!
Notice how this client’s navel “folds down” / collapses when they sit? If there is a large ball or gemstone like a traditional navel curve, the area will be extremely uncomfortable and the piercing will never heal. At worse, the piercing can reject entirely, leaving a large discoloured scar.
Now imagine using a Flat Disc or Small Bead instead of a large gemstone, the area will have more room for natural movement, and you won’t “feel” the jewelry being there when the client sits and bends over.