The baby’s nose on both sides of the blue, may be the veins show, serious respiratory tract infection, cyanosis congenital heart disease and other causes. 1. Vein exposure: baby around the bridge of the nose green, may be superficial veins are more exposed, if the baby clinically no other symptoms, there is no other aspects of the end of the extremities of the bruises, the parents do not need to worry too much about this situation. 2. severe respiratory tract infection: babies are prone to respiratory tract infection, respiratory tract infection will lead to ventilation and ventilation function is affected, so that the baby’s body occurs in the absence of oxygen, clinically may be manifested in the mouth and lips blue and other symptoms. 3. cyanotic congenital heart disease: cyanotic congenital heart disease may lead to fruit baby nose on both sides of the blue, if the cyanotic congenital heart disease, the baby’s other limbs endings, tongue, etc. will also have the performance of the blue, and clinically the baby will also appear to growth stagnation, fatigue and so on. The baby’s nose on both sides of the blue, there may be other reasons, it is recommended to go to the hospital in a timely manner, improve the examination to clarify the cause of the disease, under the guidance of the doctor to give targeted treatment or treatment.