Under normal physiological conditions, saliva is an odorless, tasteless, clear liquid produced mainly by the salivary glands in the mouth. If there is inflammation in the salivary glands, it is possible that the saliva will become salty, but not smelly. If you feel that the saliva is smelly, there are two causes: first, more bacteria in the mouth, such as poor oral hygiene, the presence of more calculus, chronic gingivitis, periodontitis, the presence of dental caries in the mouth, rotten roots have not been removed, the number of bacteria in the mouth will be very large, will secrete a lot of smelly substances, into the mouth within the saliva, so that the saliva becomes smelly. Second, if there is chronic cryptic tonsillitis, there will be a lot of bacterial plugs in the tonsil crypt, once the bacterial plugs fall off and enter the mouth, it will make the saliva in the mouth become especially smelly.