Small white particles in the wall of the throat with a little foreign body sensation may be caused by pharyngeal keratosis, chronic crypt tonsillitis, acute pharyngitis and other causes. 1. Pharyngeal keratosis: it is abnormal keratinization of pharyngeal lymphatic tissue, which mostly occurs in palatine tonsils and lingual tonsils. Patients often feel discomfort in the throat, such as dryness and foreign body sensation. Keratotic lesions are located in the epithelial layer of the palatine tonsil fossa or between the follicles of the lingual tonsils. When examined, the tonsils are honeycombed, and there are small white particles in the pharyngeal wall at the mouth of the fossa. 2. Chronic crypt tonsillitis: tonsillar crypts and lymphoid follicles have obvious chronic inflammation manifestations, such as a large number of shed epithelium, bacteria, lymphocytes and leukocytes gathered in the crypt to form a pus embolism, so that the crypts are obviously enlarged to form small cysts or abscesses, pustules, cysts, or abscesses, small when shaped like white rice grains, located on both sides of the pharynx, the presence of foreign body sensation. 3. Acute pharyngitis: acute inflammation of the pharyngeal mucosa, submucosal tissues and lymphatic tissues, there can be a foreign body sensation of swallowing. After the onset of mucosal congestion, edema, submucosal glands inflammation and blockage can be white granular secretion, with the secretion discharged to stay in the fovea glandular capsule. Appearance of small white particles in the wall of the throat, foreign body sensation, to go to the hospital in time for examination, a clear diagnosis.