Throat area white foreign body is caused by the following situations: 1, tonsil chronic inflammatory factors: white foreign body tends to occur on both sides of the surface of the tonsils; 2, tonsil or pharyngeal keratosis: the patient’s tonsil surface crypt fossa may be due to the formation of chronic inflammatory factors some white pus embolus-like secretion or granular material, prone to a certain degree of pharyngeal blockage, foreign body sensation, and may even It may even cause a bad taste in the mouth. The white granular material contains some inflammatory secretions and is often mixed with food debris. In the presence of pharyngeal keratosis, the texture of the white foreign body tends to be relatively hard, and the adhesion to the mucosal surface of the throat tends to be tight.