The causes of cold hands and feet of one month baby are: 1, the hands and feet are at the end of the blood circulation, reflecting the degree of hot and cold will be slower, and and the baby’s hands and feet are always dishonest, like to raise high, these are the causes of insufficient peripheral blood perfusion, so the hands and feet love cold. 2, the neonatal brain nervous system development is not yet perfect, poor temperature regulation, if the indoor environment where the temperature is low, it will appear 3, the baby wears less, covers the quilt thin also appear cold hands and feet reason. 4, baby fever before also have cold hands and feet phenomenon, to the child to take the temperature, and observe whether the child sneezing, runny nose, cough and other cold symptoms.