It is relatively common for a 2-year-old child with a fever of 39 degrees to have cold hands and feet. When a child has a fever, in order to ensure the blood supply to the internal organs, there is often vasoconstriction in the surrounding tissues, and the amount of blood circulation in the hands and feet will be relatively reduced, so the phenomenon of cold hands and feet will occur. At this time, you can use hot water to soak your child’s feet to promote blood circulation, or you can take a bath, or take a warm bath, and rub the neck, underarms, groin and other places where large blood vessels pass through more often. If the effect is not good, you can also give your child ibuprofen suspension to reduce fever, usually 0.5-1 hours after the temperature can be reduced, the child’s cold hands and feet phenomenon will also be improved.