There are many reasons why newborns have cold hands and feet, such as low ambient temperature, malnutrition, and disease factors. 1. Low ambient temperature: Parents do not do a good job of keeping the newborn warm, such as quilt is too thin, thin clothing, etc., or due to the low temperature of the surrounding environment, can lead to the phenomenon of cold hands and feet of the newborn, usually improve the ambient temperature, do a good job of warmth will be improved. 2. Malnutrition: Insufficient breast milk or insufficient feeding of the mother can lead to insufficient absorption of nutrients by the newborn, and therefore cold hands and feet may occur. 3. Disease factors: the newborn digestive tract, mucous membranes, respiratory tract and other parts of the virus, bacteria and other pathogenic infections, can also lead to cold hands and feet phenomenon, and even cause fever, respiratory difficulties, increased body temperature and other phenomena. There are many causes of cold hands and feet of newborns, if accompanied by uncomfortable symptoms or long-term failure to relieve, should be timely consultation, after a clear diagnosis to give targeted treatment.