The sore throat after running 800 meters may be due to the fact that the patient opened his mouth to breathe air without nasal humidification and entered his throat directly through the oropharynx, resulting in a dry throat and sore throat. Generally speaking, it is recommended that patients can drink warm water after exercise to protect their throat. Most patients can gradually relieve their throat by taking a short rest and eating appropriate fruits for throat moistening. If the patient always feels very uncomfortable or painful in the throat, it is recommended to have an ENT examination, and the more common diseases are pharyngitis, tonsillitis, epiglottitis and so on. Generally speaking, this situation should not be very serious, mainly with the patient open mouth hyperventilation, air does not go through the humidification effect, induced inflammation of the throat may have a relationship.