Infant hypoxia will cause a certain degree of damage to the circulatory system, nervous system, respiratory system, motor system and other systems, manifested as perioral bruising, consciousness disorders, respiratory difficulties, dystonia abnormalities. 1. Circulatory system symptoms: the heart will compensate to speed up blood circulation to alleviate the lack of oxygen in the body, to facilitate the transport of more oxygen to the body, due to the low oxygen saturation of peripheral blood, resulting in the color of the blood is purple, resulting in the baby’s lips purplish or cyanotic. 2. Neurological symptoms: showing disturbances of consciousness, such as over-excitement, irritability, excessive inhibition or drowsiness, and loss of normal sleep. 3. Respiratory system symptoms: the breathing rate will also change, such as accelerated respiratory rhythm, irregular frequency, and gradual development of dyspnea. 4. Symptoms of motor system: lack of oxygen supply to muscle cells after hypoxia leads to muscle weakness, such as loss of muscle tone and weakness. Once an infant suffers from hypoxia, it should be sent to the hospital in time to avoid delaying the condition and causing serious damage.