Patients with bad breath are better suited to eat more vegetables or fruits with high fiber content, such as celery and apples, which are rich in fiber and help to secrete a lot of saliva, and while chewing these fibers help to remove food residues attached to the teeth, thus avoiding the formation of bad breath. Also more suitable for eating foods rich in vitamin C, and some trace elements and minerals, such as cucumber, lotus vegetables, etc. These foods can strengthen the resistance of the mouth, making the mouth more healthy, and then less oral diseases, to avoid bad breath. In addition, it is also more suitable to eat cool food, such as dandelion, pear, bitter melon, etc., eat more of this type of food to avoid fire, to avoid bad breath.