Cold hands and feet when the baby has a fever is caused by poor peripheral circulation, is a normal phenomenon when the fever, do not need special treatment. If the temperature does not exceed 38.5℃, you can first give physical cooling, drink more water, put a cool towel on the forehead, wipe the body with warm water, wipe the neck, thigh root, armpits, elbow folds, or soak the baby in a basin and take a warm bath, all of which can help to cool down the temperature. If the body temperature once more than 38.5 ℃, and there are no other symptoms, you can give oral antipyretics, choose acetaminophen within half a year, after half a year can choose ibuprofen, if combined with cough, diarrhea, vomiting or even headache, poor mental health, etc., must be brought to the hospital as soon as possible. If the fever does not cool down within 2 hours after taking the antipyretic medication or if the fever is repeatedly high and does not subside, and if the fever lasts for more than 2-3 days, it is necessary to bring the patient to the hospital as soon as possible to clarify the cause of the fever so as not to delay the condition.