Most of the throat blisters in children with fever are due to herpes pharyngitis. The cause of herpes pharyngitis is viral infection, the main pathogens are coxsackievirus A and enterovirus 71, the virus through the digestive tract or respiratory tract invasion of the body caused by the development of the disease. You can take oral ibuprofen or acetaminophen to reduce heat treatment, and drink ice water to relieve the pain and discomfort in the throat. Be careful to isolate the patient to avoid cross-infection. Children who have difficulty eating and whose fever does not go down should be rehydrated appropriately to prevent electrolyte disorders. Physical cooling, such as antipyretic patches, warm baths, etc., can be given when fever develops.