Suddenly swallowing saliva can not swallow, may be acute tonsillitis caused by the adverse symptoms, may also be acute epiglottitis, acute pharyngitis and other diseases caused by the discomfort. 1. Acute tonsillitis: Acute tonsillitis may lead to a sudden inability to swallow saliva, swelling around the tonsils, pain and other symptoms, swallowing action, discomfort will be more intense, usually accompanied by fever, chills and other symptoms. 2. Acute epiglottitis: Acute epiglottitis will lead to a sense of obstruction in the throat, which will cause sudden gagging and swallowing, and there will be obvious pain in the throat, difficulty in swallowing and other undesirable symptoms, which may lead to poor breathing, and even cause life-threatening asphyxia. 3. Acute pharyngolaryngitis: Suddenly swallowing saliva can not swallow, may also be acute pharyngolaryngolaryngitis caused by the discomfort, the patient will usually appear sore throat, triggered by dysphagia, the throat will appear foreign body sensation, part of the patient will be manifested as hoarse voice. This kind of discomfort, there may be other reasons, you need to consult a doctor in time to identify the cause of the disease, under the guidance of the doctor’s advice to actively cooperate with the treatment.