Newborn baby feet cold divided into physiological reasons and pathological reasons, 1, physiological reasons: poor peripheral circulation in newborns, thus supplying energy and poor nutrition is easy to cause cold feet, while warming facilities can not reach, wear too little, the ambient temperature is too cold also easy to cause the baby feet cold. Therefore, we must pay attention to timely warming, ambient temperature 22-24 ℃, humidity 40-60%, insulation effect is not good can be put on the bottom of the baby’s feet warm water bag to achieve the effect of heating, but pay attention to the temperature can not be too high to avoid burns. 2, pathological reasons: some diseases can also lead to cold feet in newborns, such as congenital heart disease, serious infections and even sepsis, can lead to cold hands and feet and skin pattern-like peripheral circulation contraction changes, the symptoms of such changes are heavy, need to be promptly sent to the hospital for consultation. Other conditions such as hypothyroidism, severe anemia, and hypoglycemia can also cause cold hands and feet. In this case, we should look for triggering factors and treat the original cause, such as congenital hypothyroidism, which requires the use of thyroxine tablets and dynamic monitoring of the baby’s thyroid function; anemia, which requires a clear cause and appropriate treatment; and hypoglycemia, which requires sugar supplementation, and recurrent and persistent hypoglycemia, which also requires further investigation.