Halitosis is a condition in which the breath comes out of the mouth in a foul odor, and is usually a manifestation of a variety of factors, or is caused by the effects of other diseases. Exhale when the mouth has a clear odor, brushing teeth can not be eliminated. Most of them are related to factors such as poor diet, overeating, indigestion or localized infection in the mouth. When the spleen and stomach function is weak, indigestion is poor, and the accumulation of host food turns into heat, it is easy to cause the gastrointestinal tract to steam with dampness and heat, and the symptoms of bad breath appear. You can use heat and dampness Chinese medicine to regulate, such as oral ox-huang stomach-cleansing pill. If the oral local infection factors lead to, usually pay attention to the oral local hygiene, morning and evening diligently brush teeth, eat less spicy and stimulating food, you can use rinse to clean the oral cavity, if necessary, need to go to the hospital scaling or subgingival scraping treatment. Diet should also be light, to protect the function of the gastrointestinal tract, to reduce the symptoms of indigestion and food accumulation.