Belly button is very smelly, if there is no local pain or yellow water, pus, usually the belly button in the dirt combined with anaerobic bacteria in the breeding, reproduction, or when sweat accumulates in the belly button for a long time and the formation of odor. Regular cleaning of the navel or use disinfectant solutions, such as hydrogen peroxide, iodophor to clean to remove the odor. If there is redness, pain, and even inflammatory discharge, it is possible that the local soft tissue of the navel is inflamed and infected, and antibiotics must be applied to eliminate the infection. In addition, the local area must be strictly disinfected or bandaged, and only after the infection has improved can the odor be removed.