Bad breath kissing is not contagious, but bad breath patients have more germs in their mouths and more serious oral problems, so if intimate contact is made, the chances of bacterial infection may increase, and it is recommended that patients with bad breath should be treated first, which is good for their own health and that of their families. If you have periodontal disease and inflammation, you can take Niuhuang detoxification tablets orally, drink water with honeysuckle, and also gargle with water made from mint leaves. After meals, be sure to brush your teeth and brush carefully, no less than 3 minutes per brush to avoid fermentation of food residues and the release of more bacteria causing infection, and maintain good oral hygiene habits, bad breath will be relieved.