Red throat fever is herpes pharyngitis, acute tonsillitis, acute pharyngitis and other related. It is recommended to go to the hospital in time to improve the relevant examination and clarify the cause of the disease. 1. Herpetic isthmus: Herpes is caused by a variety of bacterial or viral infections in the pharyngeal isthmus, leading to visualization of the throat red, but also fever, sore throat, refusal to eat, nausea, abdominal pain and other symptoms. 2. Acute tonsillitis: Inflammation caused by pathogenic microbial infection, resulting in tonsil congestion, redness and swelling of the throat. Systemic symptoms such as pharyngeal pain, dysphagia, fever and chills may also occur. 3. Acute pharyngolaryngitis: virus-induced inflammation of the mucous membrane of the throat, resulting in congestion and swelling of the mucous membrane of the throat, and the throat can be seen red on visual examination. Patients can be accompanied by different degrees of fever, hoarseness, cough and other symptoms. It is recommended to go to the hospital in time to improve the systematic examination, clarify the cause and condition, and follow the doctor’s instructions to standardize the treatment.