Sudden sore throat and pain in swallowing saliva may be caused by foreign body stuck in the throat, acute pharyngitis, acute tonsillitis and other factors. 1. foreign body stuck in the throat: for example, when eating fish, fish splinter stuck in the throat area, resulting in local tissue damage in the throat area, there will be a sudden pain in the throat, and gulp pain, accompanied by symptoms such as foreign body sensation in the throat. 2. Acute pharyngitis: usually an acute attack, resulting in pharyngeal mucosal congestion and edema, there will be symptoms of throat pain, accompanied by difficulty swallowing, irritating cough, fever and other symptoms. 3. Acute tonsillitis: usually caused by type B hemolytic streptococcus infection, causing damage to the mucosa of the throat area, will cause pain in the throat, in the swallowing of saliva as well as swallowing food, the pain of the symptoms significantly aggravated, accompanied by a high fever, dyspnea, general body aches and pains, malaise and other symptoms. Suddenly sore throat and swallowing pain, it is recommended to consult a doctor in time for examination and treatment, to avoid delaying the condition.