1. Fecal odor and halitosis: gastrointestinal diseases: acid odor often occurs in chronic atrophic gastritis; Bad duck egg bad breath often occurs in advanced gastric cancer with pyloric obstruction; Fecal odor often occurs in patients with severe constipation and intestinal obstruction
2. Putrefactive halitosis: oral diseases: putrefactive halitosis can occur, such as alveolar effusion, dental caries, dense and sparse teeth, gingivitis, pulpitis, suppurative tonsillitis and salivary gland inflammation.
3. Sour halitosis: unclean mouth: bad breath can occur if you can't brush your teeth and gargle normally, have too many teeth stones, and like to eat snacks, usually sour odor.
4. Smoke odor and bad breath: a large number of smokers have smoke odor in their mouth and nose, lack of sleep, mental tension, fatigue, reduced saliva secretion of the elderly, which can aggravate bad breath.
5. Putrid and fishy breath: respiratory diseases: such as pulmonary suppuration and putrefactive tracheitis, putrefactive acid breath and malodor often occur; Hemoptysis of pulmonary tuberculosis and bronchiectasis often have bloody breath; Advanced lung cancer often occurs in the mouth and exhalation at the same time.
6, rotten apple flavor, bloody smell, halitosis: rotten apple flavor and ketone taste in the diabetic population. There is urine odor in the uremic population and exhalation, and there is liver odor (mouse odor and halitosis) in the liver coma population. There is blood odor in the hemophilia population.