Stinky throat may be caused by dry mouth, tartar, food residue corruption, in addition, it may be caused by the following diseases: 1. Oral diseases: chronic periodontitis, oral ulcers, malignant tumors in the oropharynx, etc., may lead to a foul smell in the oral throat; 2. Nasal diseases: if patients have atrophic rhinitis, sinusitis, the foul smell from the nasal cavity will spread to the throat, leading to a foul smell in the throat; 3. Diseases of the throat: Patients with chronic pharyngitis and chronic tonsillitis may have a foul-smelling throat, which is usually more obvious in the morning after waking up. Acute purulent tonsillitis and post-tonsillectomy, there may be purulent infection, which may also cause obvious throat odor; 4. Gastrointestinal diseases: If suffering from reflux esophagitis, food reflux into the throat, there may be throat odor; 5. Other: For example, lung infection may also cause the occurrence of throat odor. Patients are advised to go to the hospital for detailed examination to clarify the specific cause of the disease and treat it symptomatically under the guidance of a doctor. Also pay attention to maintaining oral hygiene, rinse and brush your teeth in time after meals, and pay attention to a light diet.