The throat swallowing saliva like sand that is swallowing foreign body sensation, consider and the posterior wall of the pharynx lymphoid follicle hyperplasia, may be reflux pharyngitis, chronic pharyngitis, may also be caused by pharyngeal tumors. 1. Reflux pharyngitis: the reflux of gastric contents stimulates the mucous membrane of the pharynx and produces localized damage, which may cause a foreign body sensation like sand in the throat when swallowing saliva. 2. Chronic pharyngitis: chronic inflammation of pharynx can be triggered by physical and chemical stimulation, acute laryngitis, tonsillitis and so on, which will lead to this symptom. 3. Pharyngeal tumor: tonsil cancer, hypopharyngeal cancer, epiglottis cancer in the process of progressing may lead to pharyngeal pain, and this symptom may also exist. It is recommended to pay attention to the care of life and diet, and actively go to ENT department of hospital to find out the cause.