Suddenly can not swallow the saliva has a variety of reasons, common causes are: acute pharyngitis, acute epiglottitis, pharyngeal foreign body and so on. It is recommended to go to the ear, nose and throat department of the hospital for examination and treatment. 1. Acute pharyngitis: acute inflammation of the mucosa and submucosal tissues of the pharynx, clinically dry, burning, rough, slightly painful throat, sore throat symptoms gradually aggravated, pain in swallowing, swallowing saliva. 2. Acute epiglottitis: it can be divided into acute infectious epiglottitis and acute allergic epiglottitis. Difficulty in swallowing often occurs due to high swelling and thickening of the tongue surface of the epiglottis, which is characterized by sudden inability to swallow. 3. Foreign body in the throat: Dysphagia often occurs due to the blockage of foreign body in the throat, which can be manifested as sudden dysphagia. Suddenly can’t swallow the saliva there are other possibilities, should be timely to the hospital outpatient clinic, clear cause, under the guidance of a professional physician, follow the doctor’s instructions for treatment, do not self-medication, so as not to delay the condition.