After darling has a fever, why upper body is hot lower body cold

The child has a fever after the upper body hot and cold phenomenon, consider may be because of bacterial infection, viral infection or mycoplasma infection and other reasons leading to fever symptoms. Suggest this time it is best to carry out symptomatic treatment, measure the baby's temperature is higher than 38.5 degrees, to oral antipyretic, lower than 38.5 degrees, to carry out physical cooling, and then to the hospital to do blood tests, clear the cause of treatment.