Newborns have a red blood strip in the eye may be caused by extrusion during the birth process, but also may be related to conjunctivitis and other factors, the specific analysis is as follows: 1. Extrusion of the birth canal: newborns at birth, especially those who are born in a normal way, will be extruded by the vagina at birth, resulting in a red blood streak in the eye, this does not need special treatment, and it will return to normal after a period of time. 2. Conjunctivitis: Conjunctivitis can also lead to the above situation, and may be accompanied by other adverse reactions, such as tearing, eye redness and so on. There may be other reasons for the red blood in the eyes of newborn babies, so we recommend that you go to the hospital in time for a relevant examination to determine the cause of the disease and then actively treat the symptoms.