When a child has a persistent fever, the first thing to look at is how many degrees the temperature has reached. Generally between 37.5 degrees and 38.5 degrees is a low fever; over 38.5 degrees is a high fever. When the fever is low, physical cooling can be carried out, such as taking a warm bath, or soaking feet, rubbing the heart of the feet or palms, can promote physical cooling. At the same time, you can take oral medication to reduce low fever, you can take oral Pu Dilan anti-inflammatory oral liquid, pediatric Chai Gui fever granules. If the fever is high, take Merrill Lynch or Tylenol to reduce the fever urgently, and then lower the temperature physically. At the same time, we also need to observe whether there are other symptoms of infection when the fever is high, such as respiratory tract infection with cough, runny nose, sneezing; digestive tract symptoms with vomiting, diarrhea; neurological symptoms are bad spirits, convulsions, coma. Drugs are 3 days to see the effect, if the medication for 3 days is still recurring high fever, you need to go to the hospital to check to see what exactly is the cause.