The four-year-old child fever may be tonsillitis, pneumonia and other diseases caused by the cause to take targeted treatment, as well as symptomatic antipyretic and other treatments. 1. Tonsillitis: a four-year-old child with tonsillitis may have a fever, sore throat and other manifestations. Patients can follow the doctor’s instructions with cefixime, cefuroxime and other antibiotics. For patients with recurrent tonsillitis, tonsillectomy can be taken. 2. Pneumonia: If pneumonia causes fever in a four-year-old child, it is necessary to treat the cause. For patients with Streptococcus pneumoniae pneumonia, you can follow the doctor’s instructions with penicillin antibiotics such as amoxicillin ravulanate potassium. If the patient develops Mycoplasma pneumoniae pneumonia, it is necessary to use erythromycin, azithromycin and other macrolide antibiotics as prescribed by the doctor. Four-year-old children with a fever not exceeding 38.5 ℃, can be through warm water baths, paste fever-reducing patches and other physical ways to reduce fever. For patients whose temperature exceeds 38.5 ℃, fever-reducing medications such as acetaminophen and ibuprofen are needed under a doctor’s supervision. Four-year-old children with fever may also be caused by blood disorders, etc. It is recommended that children with persistent fever or with other symptoms, parents are advised to take their children to the doctor in a timely manner to clarify the cause of the disease, and then follow the doctor’s instructions for treatment.