The child has a fever for 4 days and it does not go down may be related to viral or bacterial infections, etc. It may also be related to some non-infectious diseases such as Kawasaki disease. You need to consult a doctor in a timely manner to clarify the cause of the fever, targeting the use of medication, while actively reducing the fever, and do a good job of life care. 1. The cause of the medication: the child fever for four days, does not go down the existence of viral infections, oral antiviral oral liquid and other drugs anti-viral treatment; if there is a bacterial infection, the need for oral antibiotics, such as cephalexin anti-infective treatment. If the child’s fever is caused by Kawasaki disease, aspirin and immunoglobulin should be used. 2. active fever: the child fever for four days, does not go down, need to clarify the specific temperature, such as the temperature does not exceed 38.5 degrees, you can drink warm water, soak in a warm bath and other physical cooling methods to reduce the fever; if the temperature is more than 38.5 degrees, you can orally ibuprofen and other antipyretic heat less. 3. life care: the child fever for 4 days, not go down, need to pay attention to the child’s state of mind, let the child rest, give the child to prepare light, nutritious food, etc., indoor ventilation as well as the appropriate temperature and moderation. The child’s fever for 4 days, not returned may be related to other reasons, such as leukemia and other serious diseases, it is recommended to take the child to the regular hospital in a timely manner, by the doctor’s guidance on the use of medication.