Sore throat may be caused by acute tonsillitis, acute pharyngitis, acute epiglottitis and so on. 1. Acute tonsillitis: Acute tonsillitis is an infectious disease of the upper respiratory tract caused by infection with pathogenic microorganisms such as bacteria and viruses. Acute tonsillitis can cause a sore throat and may be accompanied by low-grade fever, loss of appetite, fatigue and other symptoms. 2. Acute pharyngitis: pharyngitis caused by viral or bacterial invasion, due to inflammation and congestion of the mucous membrane of the throat may have the symptoms of redness and swelling of the throat, sore throat. 3. Acute epiglottitis: the erosion of bacteria, viruses and harmful substances leads to inflammation in the epiglottis, localized congestion and edema, which is mainly manifested as pain in swallowing, feeling of swallowing obstruction and dyspnea. Patients with sore throats are advised to go to a regular hospital in time to clarify the cause of the disease and give targeted treatment under the guidance of a professional doctor.