Why does my old belly button piercing suddenly smell bad multiple years later?
1. Introduction An old belly button piercing suddenly smells bad multiple years later due to the natural accumulation of dead skin cells, sebum, and sweat within the healed piercing channel, medically known as a fistula. Over time, normal skin bacteria break down this trapped organic material, producing foul-smelling sulfur compounds that cause the noticeable odor. … Read more