Herpes pharyngitis is a common infectious disease in infants and children and is usually considered to be most severe on days 3-6 of herpes pharyngitis. Herpes pharyngitis is the result of viral infection, generally associated with coxsackie A16 and EV71 virus infection. There are three main phases of herpes pharyngitis, namely the incubation period, prodromal phase, and onset phase. In the incubation phase of herpes pharyngitis, i.e. 1-2 days, the patient will not have any symptoms; while in the prodromal phase, the patient will have symptoms such as fever and blisters on the palate; when herpes pharyngitis develops to 2-3 days, the patient enters the onset phase, when not only fever, but also high fever symptoms may occur, and serious symptoms such as oral ulcers, pain, drooling, and refusal to eat may occur due to the breakage of the blisters. Therefore, patients with herpes pharyngitis have the most severe symptoms on days 3 to 6. In addition, herpes pharyngitis is highly contagious, so patients should be treated in isolation and used dishes should be disinfected to prevent cross-infection.