Sudden pain in the throat may be caused by foreign body retention, acute epiglottitis or acute tonsillitis. 1. Foreign body stagnation: foreign body stagnation in the throat due to improper diet, and then suddenly very painful phenomenon due to scratching the laryngeal mucosa, such as fish splinters, and so on. 2. Acute epiglottitis: acute inflammatory lesions involving the epiglottis, mostly related to infection and metabolic reactions and other factors, which can also appear in the phenomenon of sudden pain in the throat. 3. Acute tonsillitis: acute non-specific inflammation caused by bacterial, viral and other pathogenic bacteria infecting the tonsils, due to the stimulation of inflammatory factors and the phenomenon of sudden sore throat, accompanied by chills, fever and other symptoms. There are many other causes of a sudden sore throat, so it is recommended that you go to the hospital to find out the cause of the problem and actively cooperate with the doctor for treatment.