Often have bad breath phenomenon. First of all, it may be caused by poor oral hygiene, in daily life should maintain good oral hygiene, eat food to light, try to eat less food with a stimulating taste, such as raw garlic, raw onion, durian, stinky tofu and other foods. Secondly, to develop good oral hygiene habits, in the morning and evening every day to brush your teeth on time, after meals to develop the habit of rinsing the mouth, so that food residues as far as possible to be cleaned outside, not easy to have bad breath produced. Then, it may be caused by diseases in the mouth, such as wisdom teeth, dental caries, pulpitis, gingivitis and other oral diseases, all of which may cause bad breath. So you need to confirm your problem and go for the right treatment to be able to solve the problem of bad breath.