Baby tongue purple what happened?

Baby tongue purple reasons mainly include the following: 1, due to children suffering from congenital heart disease, in the baby suffering from severe cyanotic congenital heart disease will cause systemic hypoxia, this time children's tongue color often purple, children will also be accompanied by perioral cyanosis, children often grow and develop backward, can give the baby timely heart color ultrasound to diagnose. 2. Because the baby suffers from severe pneumonia, it will also cause ventilation dysfunction in alveolar parts after the baby suffers from severe pneumonia, so it will cause hypoxia in the body, and the tongue will turn purple under severe hypoxia.