It may be caused by bad bacteria growing on the very back of your tongue. Here are the steps to take to treat it.
Use Hibiclens 4% antiseptic skin cleanser, which is available at your drugstore
Place 2-4 drops on your toothbrush
Reach the toothbrush as far back on your tongue as possible
Rinse, because it will taste yucky!
Do this again tomorrow, and your breath should be much better! See our blog for more ideas if you are worried about your breath. www.yourbwaydental.com