Under normal circumstances, if you adhere to the correct method of brushing, flossing, and regular scaling, the gap between your teeth will not normally become smelly. If the teeth stink, there are two reasons: the first reason is that the teeth are not flossed in time and there are many food inclusions in the teeth. If the food inlay is not removed for a long time, local decay will occur, forming a more obvious odor, so flossing must be done at this time. After the tooth decay occurs, it must be treated with filling.