Bad breath is annoying to the next person, but also to their own troubles. The triggering factors are mainly two, one is poor dietary hygiene habits, resulting in damage to the oral and gastrointestinal channels; the second is the microbes in the esophagus at play. Bad breath can be seen in the body’s internal diseases According to Chinese medicine, the accumulation of heat in the stomach and intestines, stomach fire, or lung and large intestine heat will appear bad breath, mostly caused by the evil of fire and heat offending the stomach. In addition, bad breath may be caused by hot phlegm offending the lung, or by hot phlegm becoming pus and rotting for a long time, or by internal heat from Yin deficiency. This condition is usually accompanied by other symptoms of fire such as dry stools, swollen and sore gums, red face and body heat. However, there are many other causes of bad breath. One common cause is oral disease. Experts say that if there are untreated dental caries, root, crown, periodontitis and oral mucosal disease in the mouth, it can cause bad breath. This is because deep caries cavity, bad restoration under the suspension often remains food residue and plaque, bacteria through fermentation decomposition, produce bad smell. Patients with periodontal disease often have a large amount of tartar and plaque, and bacteria fermentation in the periodontal pockets produce hydrogen sulfide and ammonia, which produce bad odor. Another common cause is digestive system diseases. Experts say, such as indigestion, gastritis, gastric ulcer, duodenal ulcer, gastrointestinal metabolic disorders, etc. may appear odor; pyloric obstruction, advanced gastric cancer often appear smelly duck egg bad breath. In addition to these two common causes, some other oral adjacent tissue diseases, such as purulent tonsillitis, atrophic rhinitis, etc., can produce purulent secretions and emit odor; diabetic ketoacidosis patients can exhale acetone gas; uremic patients exhale rotten apple odor. In addition, leukemia, vitamin deficiency, heavy metal poisoning and other diseases can be caused by bad breath. The following foods can help get rid of and prevent bad breath: Parsley Parsley can effectively neutralize bad odors in the mouth and remove bad breath caused by smoking. If buying parsley is not convenient, you can also find caraway, mint, artemisia and cardamom to replace it. In order to receive the most ideal results, you need to chew the above-mentioned foods more often or brew them like tea. These foods not only eliminate bad taste in the mouth, but also help digestion. Yogurt Recent studies by scientists have shown that drinking yogurt daily is beneficial in eliminating the level of hydrogen sulfide in the mouth, which is the culprit of bad breath. Long-term yogurt consumption also prevents the growth of harmful bacteria in the mouth, which can prevent dental bed disease and dental plaque. Of course, when choosing yogurt, be careful to choose plain yogurt without added sugar. Fruits Fruits with high fiber content, such as apples, allow people to produce more saliva when consumed, which helps lubricate the mouth and absorb other food debris. Often, food debris left in the mouth is also a cause of bad taste in the mouth. Vitamin C-rich foods Berries, citrus, watermelon and some other vitamin C-rich foods can create a special environment inside the mouth where microorganisms find it extremely difficult to survive. The way to consume this vitamin C is to eat natural foods, not artificially added vitamin C from various types of foods.