The duration of fever in herpes pharyngitis is usually 2 to 4 days, with individual variations. Herpetic isthmus is mostly seen in children, is a kind of acute infectious pharyngitis, mostly caused by coxsackievirus, mainly summer and fall high incidence. Generally, the fever of this disease is mostly low or moderate fever, but there are also body temperature up to 40 ℃ or more, even high fever can cause convulsions. Herpes pharyngitis fever time is generally 2~4 days, there are individual differences. After the fever if the body temperature does not exceed 38.5 ℃ and there is no other serious disease, you can use ice packs cold means of physical cooling. Children with high fever and convulsions need to apply antipyretic drugs in a timely manner, and if necessary, apply glucocorticoids and other drugs to inhibit inflammation. If herpes pharyngitis fever for more than 3 days without improving trend, or the emergence of convulsions, lethargy and other abnormal manifestations, it is recommended to consult a doctor in time.