The cold hands and feet of newborn babies may be due to the weak thermoregulatory ability of babies, which is a normal phenomenon, or it may be related to the incomplete development of heart function or bacterial infection and other pathological factors, which is an abnormal phenomenon. 1. Normal phenomenon: newborn babies have weak thermoregulatory ability, when the outside temperature is too low or wear too little, they will have cold hands and feet, which is a normal phenomenon. 2. Pathological phenomenon: the incomplete development of the infant’s heart function, there are certain defects, may cause the whole body’s blood supply is poor, which leads to the newborn baby hands and feet cold. Or if a newborn baby has a bacterial infection, it is also easy to lead to poor blood circulation, resulting in the phenomenon of cold hands and feet, this kind of disease is caused by factors that are abnormal, and need to consult a doctor in a timely manner. There may be other reasons why a newborn baby’s hands and feet may be cold, so parents are advised to take their babies to the hospital for examination and diagnosis, and after the cause of the problem has been clarified, treatment should be carried out under the guidance of the doctor.