Newborn bruising after breastfeeding may be caused by hypoxia. If the newborn only appeared purple phenomenon when eating milk, may be the existence of hypoxia, mainly in the newborn feeding, feeding position is not appropriate caused by, for example, breast feeding, the newborn’s nostrils will be blocked, resulting in temporary hypoxia, but also easy to lead to choking and coughing. It is also possible that the newborn suffers from an acute upper respiratory tract infection, resulting in nasal congestion, not able to breathe properly when eating milk, thus causing the face bruises. Newborns after breastfeeding bruises must stop breastfeeding in a timely manner, when the parent-child relief and then continue to breastfeeding, and pay attention to the way of breastfeeding, to avoid blocking the nostrils. Newborns bruises after breastfeeding, there may be other reasons, it is recommended to go to the hospital in time to improve the examination to clarify the cause of the disease, under the guidance of the doctor to give targeted treatment or treatment.