There are two main aspects to consider when a patient coughs up a very foul-smelling foreign body inside the throat. The first one is that the patient does not pay attention to oral hygiene and cannot rinse and brush well after eating. Sometimes the residue of food will be stored in the mouth, as well as on the root of the tongue, which is especially likely to lead to food decay and deterioration, and sometimes very smelly yellow particles will be formed. Secondly, the patient has chronic tonsillitis, with a lot of scar formation on the surface of the tonsils. Sometimes the remnants of food are stored inside the scar of the tonsils after meals, and over time, very smelly granules are formed. In terms of treatment, patients must pay attention to hygiene, enhance mouth rinsing after meals, and brush their teeth twice a day. At the same time, they should exercise more to strengthen their resistance and avoid repeated inflammation of the tonsils. You can take busulfan anti-inflammatory oral solution orally to reduce the inflammation on the surface of the tonsils, or you can gargle with compound tinidazole containing solution to reduce the formation of anaerobic bacteria in the mouth.