There are many reasons for a putrid odor in the throat, such as poor oral hygiene, atrophic pharyngitis, reflux pharyngitis, tonsil stones and so on. 1. Poor oral hygiene: daily oral hygiene, such as not brushing teeth after eating, not gargling, due to the long-term accumulation of food debris in the oral cavity for fermentation, can cause a putrid odor in the throat. 2. Atrophic pharyngitis: the mucous membrane of the pharynx is atrophic and thin, pale and shiny, often with sticky secretions or yellow-brown scabs with a foul odor. 3. Reflux pharyngitis: the contents of the stomach and stomach acid reflux to the throat, which can cause a rotten odor in the throat, accompanied by obvious belching, hiccups, bloating and other phenomena. 4. Tonsil stones: most of the tonsil stones are due to the inflammatory reaction of the tonsils, which can cause a putrid odor in the throat, and the tonsils can be found to have caseous stones after examination. There are many reasons why there is a putrid odor in the throat, and it is recommended to go to the hospital in time to improve the examination and diagnosis, and take standardized treatment under the guidance of the doctor.