The blackening of the fingertips of newborns is usually related to physiological factors such as environmental cold, trauma and pathological factors such as hypoxia. 1. Cold environment: if the environment in which the newborn is cold, it may lead to the newborn finger vasoconstriction of blood supply to the fingertips of insufficient, manifested in the fingertips of black situation. 2. Trauma: If a newborn’s fingers are accidentally squeezed by trauma, it may also cause the symptom of blackened fingertips. 3. Lack of oxygen: If a newborn baby has been in shock for some reason or suffers from cardiopulmonary diseases, he or she may also have the symptom of blackened fingertips. There may be other reasons for the darkening of the fingertips of newborns, it is recommended to go to the hospital in time, after clarifying the cause of the disease, with the help of the doctor to give targeted treatment or treatment.