Short and rapid breathing in 8-day-old newborns may be a physiological phenomenon; it can also be a symptomatic manifestation of certain diseases, such as heart disease, respiratory disease, and should be promptly consulted to find out the cause. Physiological causes of shortness of breath in 8-day-old newborns include immature development of the respiratory center, fast breathing, and short and rapid breathing compared to adults. Heart-induced shortness of breath includes congenital heart disease, ischemic-hypoxic myocardial injury, persistent pulmonary hypertension, etc. If dyspnea occurs, it may be accompanied by other symptoms such as cyanosis and feeding difficulties. Respiratory diseases are mainly pneumonia, such as aspiration pneumonia, including inhalation of amniotic fluid or meconium can cause shortness of breath in newborns. There may be other reasons for shortness of breath in 8-day-old newborns. It is recommended to go to the hospital in time for a complete examination to clarify the cause of the disease, and then give targeted treatment or therapy under the guidance of the doctor.