Oxygen deficiency in newborn babies needs to be taken seriously, usually it does not cause sequelae, but if the situation is serious, it needs to be dealt with in time to avoid the impact on the child’s future, and in serious cases, it may cause brain damage. Many times newborn babies lack oxygen, mostly caused by lack of oxygen in the mother’s body, lack of oxygen at birth is a very normal thing, but serious may cause brain damage, need to go to the hospital for examination and treatment. So the mother needs to eat more vegetables and fruits rich in minerals and vitamins during pregnancy, drink more water and exercise more, so that the baby will not be deprived of oxygen during the fetal period. There are several manifestations of oxygen deficiency in babies: 1, once the baby refuses to breastfeed, choking and so on, it may be a symptom of oxygen deficiency; 2, the baby cries very little or cries all the time, the voice is weak is also a manifestation of oxygen deficiency; 3, the baby is easily frightened. To sum up, the main manifestations of oxygen deficiency are the above three. Mothers can judge whether their babies are in good condition according to the above three methods whether they have the symptoms of oxygen deficiency, if they have the situation of oxygen deficiency, they should go to the hospital for treatment in time, and they can inhale oxygen through the aid of instruments.