The first thing you need to do is to make sure that the air is well circulated and that there is an adequate supply of water. If the child is in good spirits, you can first reduce the fever physically and take antipyretic medication, and then send him to the doctor for treatment. 1. Ensure air circulation: after a child with a fever of 39 degrees, the first thing you must do is to keep the air circulating indoors, you can let the child wear less clothes, do not use the quilt wrapped, through the ventilation of the heat to reduce the fever. 2. Ensure adequate supply of water: fever will take away part of the body’s water, if the fever is 39 degrees, you can let the children drink more warm water, and at the same time let the children more urine, can take away part of the heat, so as to achieve the effect of fever. 3. Physical fever: you can use warm water to wipe the child’s armpits, forehead and other parts of the body surface through the evaporation of liquid, usually can achieve the effect of physical fever. 4. medication: toddlers with a fever of 39 degrees need to take medication, be sure to choose the side effects of less fever-reducing drugs, you can take acetaminophen, ibuprofen and other drugs under the guidance of the doctor to reduce fever. If a toddler has a fever of 39 degrees, parents must take timely measures to deal with it, and then go to the hospital in time for treatment.