The hard black crust in the navel is a hard lump formed by the accumulation of dirt, sebaceous gland secretions or seepage of fluid at the navel.
When the navel is not cleaned for a long time, dirt and sebaceous gland secretions accumulate to form a hard black crust, and when the belly button is inflamed or infected, fluid oozes out to form a hard black crust.
Black crust in the navel if not treated for a long time may produce an unpleasant odor, but also on the navel part of the health of the adverse effects, so every interval of time need to clean the navel.
Before cleaning up with saline to moisten the black crust, can not be forced to pick out, moistened with a cotton swab repeatedly wipe to remove the hard pieces. After the removal of hard lumps in the navel apply povidone-iodine or Pepto-Bismol ointment to disinfect, to avoid causing infection triggered by umbilical cord infection.