The main reason for cold extremities in children with fever is that when fever occurs, blood is redistributed throughout the body, mainly to provide energy consumption for the brain, heart and other major organs, resulting in reduced blood circulation in the distal extremities and other extremities, with a consequent decrease in skin temperature. In this case, the normal temperature of the skin of the extremities needs to be restored in time, and blood circulation can be promoted by physical methods such as warm water rubbing baths and baths to avoid chills caused by cold extremities for too long, which can be followed by febrile convulsions and severe reactions such as respiratory depression, tonicity and shaking of the extremities, and therefore need to be dealt with in time and accompanied by oral antipyretics and medical evacuation.