To quickly treat bad breath, go to the hospital to clean teeth to remove food residue, soft tartar, tartar and other dirty things on the surface of the teeth and between the teeth, to create a good oral hygiene environment, so as to play the effect of fresh breath, and at the same time to avoid the body on fire, to drink more water, you can take oral medication with fire-clearing function, such as Niuhuang Shangqing Pills, Andrographis tablets, etc., you can also drink more tea to clear heat and reduce fire, such as Honeysuckle tea, chrysanthemum tea, bamboo tea, can also play the effect of fresh breath. Brush and rinse your teeth carefully in daily life, brush every tooth surface, and brush the back surface of your tongue gently with toothbrush bristles to remove bacteria and food residue on the surface of your tongue. If the teeth in the mouth are suffering from caries, we should actively carry out the treatment of caries, because caries can also cause bad breath.