The belly button is a place where germs can become trapped and multiply. Too many germs in the belly button can cause an infection, which may lead to discharge through the skin. Belly button discharge can have various colors and give off an unpleasant smell. There are a few different causes of belly button discharge, each requiring a specific treatment. Leaving the belly button unclean can allow harmful bacteria to overpower the helpful ones and cause an infection. According to a paper posted by PLOS One , the average belly button contains 67 different types of bacteria, some harmful and some helpful.
In order for a navel to heal properly it must have a good lip of skin above the navel or in some cases, below with space both behind and below the lip for the jewelry to sit without pressure. The lip of skin should be a flap like an earlobe , with an obvious front and back to it and a defined edge between the two. Likewise, attempting to pierce navels that do have a flap but do not have enough space behind them to allow jewelry to sit comfortably will generally result in a difficult and problematic healing process.
The navel clinically known as the umbilicus , colloquially known as the belly button is a protruding, flat, or hollowed area on the abdomen at the attachment site of the umbilical cord. The umbilicus is used to visually separate the abdomen into quadrants. The umbilicus is a prominent scar on the abdomen, with its position being relatively consistent among humans. The skin around the waist at the level of the umbilicus is supplied by the tenth thoracic spinal nerve T10 dermatome.