1, often do not eat breakfast do not eat breakfast will cause impediments to the prevention of bad breath saliva production, resulting in damage to oral health. 2, the number of chewing is too little Chewing is the first process of food digestion, eating slow, eating chewing more often can secrete a lot of saliva, and saliva can effectively control the reproduction of miscellaneous bacteria, to prevent the production of bad breath. Chewing less often, swallowing directly will easily lead to bad breath. 3, tongue cleaning problems The more the number of tongue moss, the more likely to cause bad breath. So when you brush your teeth, you should pay more attention to the cleaning of tongue moss. 4, the wrong way of brushing toothpaste residue is not only the main culprit of dental caries, periodontal disease, but also easy to cause bad breath, so usually brush your teeth carefully and spend as much time as possible. 5, there are diseases in the internal organs Once a person suffers from internal diseases, the abnormal fermentation of the body odor will be discharged through the blood vessels and lungs, which will also lead to the production of bad breath. That is to say that bad breath is also an effective way to test the body’s internal diseases. 6, did not brush your teeth before going to bed because the harmful bacteria in the mouth when you sleep in the reproduction and growth, and the mouth is generally closed, bad breath is the bacteria in the closed environment of growth and fermentation of the flavor. So be sure to brush your teeth before going to bed, and conditions can be used together with mouthwash, the effect will be very obvious. 7, gastrointestinal function is not good It may be that your gastrointestinal function is not good, in the process of digestion of the gas produced through the esophagus back to the mouth. 8, saliva secretion decline Due to the decline in salivary secretion at night, the acidity in the mouth is reduced, making anaerobic bacteria decomposition of sulfur-containing proteins become abnormally active, so the fecal reefs produce more sulfide than other time periods, so the morning up the most serious halitosis. Fecal reef refers to the combination of food debris and intestinal bacteria, the accumulation of time slowly formed like a rock-hard reef-like material, which is firmly attached to the intestinal wall, is also the main cause of bad breath. And fecal reefs accumulate in the body for a long time, easy to produce hundreds of toxins. These toxins through the blood circulation, spreading the body organs, will lead to tissue cell lesions, triggering more than 370 diseases. Therefore, the problem of fecal reefs should not be underestimated.