Children crying face blackened was what causes

My little baby when crying often face blackened, what is this thing? Do matter? Kunming Jiao Lan

Children often cry face is blackened, its main reason for this is because reducing the amount of oxygen in the blood. Because the blood in our bodies, the amount of oxygen, are factors which determine the blood color. High arterial blood oxygen content that the color red; venous blood oxygen content less that the color dark red.

Normal blood color performance in colour, for instance, anemia of blood dilution, so the ground colour pale; drink wine or just finished moving the human heartbeat, blood circulation accelerating skin blood flow increases, so the colour red.

Face will turn black when the baby cries, the reason for this is:

First: children crying action is prolonged breath and not breathing, therefore cry longer, less oxygen into the body, although inevitably mixed with continuous inspiration, but compared to breath is too few.

Second: usually normal in end-expiratory Lung also remnants of some two-thirds in the alveolar air, even briefly stopped breathing, pulmonary circulation of blood in the lungs can also be kept in oxygen into the blood. But a child is crying in the violent, air within the lungs were forcefully expelled from the body, left hold a limited amount of oxygen in the lungs, so blood can get naturally reduces the amount of oxygen.

Third: in fact, a sharp cry is represents a vigorous exercise, body oxygen consumption will increase a lot of relatively calm, relatively low oxygen levels in the blood.

IV: cry cause the pulmonary pressure rise, blood circulation to reduce natural oxygen is reduced, added part of arterial blood flow in mixed venous blood flow, so the body extremities of sharp decline in the oxygen content in blood.

In General, child crying face and skin color will darken some, this is a normal phenomenon that parents don\'t be so nervous. Of course, for some poor heart and pulmonary function of children, sharp cry result in reduced blood oxygen is a very dangerous situation, so pay particular attention to:

First of all, don\'t let children violent cries; second child cry may be given supplemental oxygen.