The main reason a belly button can stink is due to the accumulation of dirt, sweat, dead skin cells, and bacteria in the small fold or indentation of the belly button. This environment allows bacteria and fungi to thrive, producing unpleasant odors. If the belly button is not cleaned regularly or properly, these microorganisms multiply and cause a foul smell. Other causes of a smelly belly button can include infections like bacterial or yeast infections (often caused by Candida fungus), cysts, or infected piercings. These infections may be accompanied by additional symptoms such as discharge, redness, swelling, itching, pain, or a lump. People with diabetes or those who have recently had abdominal surgery may be at higher risk for such infections. Good hygiene is the simplest way to prevent or fix belly button odor by regularly cleaning the area with soap and water and ensuring it is kept dry. If the smell persists despite proper cleaning or if there are signs of infection, consulting a healthcare provider is advised to get appropriate treatment.
