Small babies because the thermoregulatory center has not yet developed perfectly, under the influence of various external factors and diseases, it is easy to cause a rise in body temperature. The situation of cold hands and feet when a baby has a fever is often seen in the clinic, the baby itself has a high fever, but the hands and feet are cold, and after the body temperature gradually drops, the hands and feet slowly warm up again. In fact, this is a phenomenon of fake cold and real heat, the child’s hands and feet are cold but the internal organs are in a feverish state, especially common in infants and young children under three years old, mainly because the amount of blood in the baby’s extremities is less than the internal organs, due to insufficient blood supply to the extremities, young children are more likely to have cold hands and feet than adults; sustained high fever in the body will cause damage to various organs of the body, the body will secrete regulatory factors in order to protect various organs, so that the blood vessels at the end of the extremities In order to protect the organs, the body will secrete regulatory factors to make the blood vessels at the ends of the limbs contract, resulting in poor peripheral blood circulation, and then the phenomenon of cold hands and feet will appear. Many parents do not understand this situation, found that the baby’s extremities are cold, mistaken for the baby cold, immediately the baby tightly wrapped up, the result is that the baby’s body temperature is not timely distribution and rise higher and higher, and even the occurrence of high fever convulsions. This time is the need for physical action to cover the hands and feet warm, because if the fever is too high when the heat is not dissipated, it is easy to make the body temperature rise again. Heat is generally excreted through sweat, cold hands and feet means poor blood circulation in the extremities, heat can not go with the blood to the extremities, you can drink more hot water or warm towels to cover the heat, or appropriate increase clothing, hot water bubble hands and feet, which can promote blood circulation, conducive to heat dissipation.