The blue color under the nose of infants may be caused by blood vessels, respiratory infections, congenital heart disease and other reasons.
1. Blood vessels showing up: the skin under the nose of infants is thin, the veins may show up, and some of the blood vessels can be seen through the skin, which is manifested as the blue color under the nose of infants.
2. Respiratory infections: Babies have low resistance, if they don’t do a good job of keeping warm, it may cause bacterial and viral infections, leading to pneumonia, bronchitis and other illnesses, which puts the body in a relative lack of oxygen, and thus may appear as a blue color under the nose.
3. Congenital heart disease: If the baby has congenital heart disease such as patent foramen ovale, aortic valve stenosis, etc., after the activity, the body’s oxygen supply is insufficient, and there will always be a blue color under the nose, which is often accompanied by shortness of breath, and the end of the limbs are blue and purple and so on.
Infants blue under the nose, there may also 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.