What causes bad breath caused by?

　　(A) of the diet flavor
　　Eating certain foods such as garlic, onions, leeks, tofu and other food itself has a specific odor, residual in the mouth after eating may issue a corresponding smell, Heating, vomiting, hiccups, often the gastrointestinal contents The smell came in vitro.
　　(B) foreign corruption
　　Remaining food residues in Chifeng in decay by bacterial action resulting from the smell.
　　(C) necrosis
　　Human tissues are constituted of proteins, such as corruption and decomposition of hydrogen sulfide odor after.
　　(D) breeding of bacteria
　　Some oral and respiratory bacterial decomposition of protein, starch, producing a large number of bacterial metabolites such as indole Duo, sulfur and ammonia-based classes such as hydrogen can cause bad breath.
　　(E) substances contained in blood of diabetic ketosis, uremia, acidosis, blood ketones, urea composition to increase the blood flow through alveolar be contained in the ketone decomposition of urea and some other gas distribution with the in vitro, so patients have the mouth acetone smell or rotten apple smell.
　　(A) of the physiological factors
　　1. Food flavor: If you drink, the smell of alcohol, tobacco smokers, except, fresh garlic, garlic odor after oral residual.
　　2. Bad breath after waking up at night sleep.
　　3. Hunger and long-term fasting can also bring a strong bad breath.
　　4. Some people in the menstrual period can occur during pregnancy and bad breath.
　　(B) of the pathological factors
　　1. Oral disease periodontal disease, caries, black tongue disease, oral necrotizing inflammation pericoronitis, oral cancer necrosis.
　　2. Nasopharynx disease suppurative maxillary sinusitis, atrophic rhinitis, acute tonsillitis, angina, pediatric nasal foreign body, etc..
　　3. Systemic diseases of other organs, such as indigestion, gastritis. Bronchiectasis secondary pulmonary infection, lung abscess, leukemia, platelet reducing disease, agranulocytosis, diabetes, lead, mercury, poisoning the town and organic matter may have a strange odor.