Herpes pharyngitis is caused by a viral infection. Herpes pharyngitis is caused by viral infection, usually due to coxsackie group A virus infection is common, herpes virus, EB virus infection is also more common, when overwork, the organism is cold, sudden changes in temperature, physical and chemical factors stimulation, allergies and other triggers lead to a decline in the body’s immunity, easy to trigger this disease. When the virus infects the organism, invading the respiratory tract and local mucosa of the digestive tract from the nasal cavity and oral cavity, the virus continues to live and proliferate in the mucosal epithelial tissue, and the virus gradually spreads to the lymph nodes through the lymphatic channels, or enters the blood circulation to produce viremia, which triggers fever, sore throat, headache, generalized muscular pain, malaise and other symptoms. Patients with herpes pharyngitis should seek medical attention promptly to avoid delaying their condition.