If you live near a source of naphthalene your house may take on a strong mothball type smell. In addition to gum disease and cavities bad breath can be caused by infected tonsilsadenoids gerd and diet. How To Get Rid Of Mothball Smell Quick And Easy Methods Mothball Smell Mothball Smelling Now that you know the common causes of bad breath you might be asking yourself. Why does my breath smell like mothballs . Mothball breath is named that because your breath will have a musty benzene-like smell to it that is often related to mothballs. One of them might help you. Starving oneself - this also leads to ketones in the breath Exposure to benzene - t. You might not notice the mothball smell right away or it may arise slowly over a period of weeks or months. What it means if your breath smells like sour milk You might be lactose intolerant. This produces an unpleasant odor. I began noticing it about the time she was diagnosed with kidney failure. Why would someones brea...