Under normal circumstances, it is best to soften the mud in the navel with povidone-iodine before cleaning it with a cotton swab. The mud in the navel is the daily production of feces, as well as the daily mixture of sweat and dust in the accumulation of the navel, over time, it will form a relatively large amount of dirt. When cleaning, first soak the navel with iodophor and wait for the dirt to soften so that it does not irritate the skin and at the same time can play a role in disinfection. Finally, then use a cotton swab dipped in povidone-iodine to gradually clean up, you can achieve the effect of safe removal. The navel is the closest internal organ to the outside world, so try to avoid picking at it with your hands or other hard objects. After getting the navel injured, it may involve the small intestine, causing the digestive system to be affected, abdominal pain and inflammation or some other discomforts.