Common causes of shortness of breath in babies are as follows: 1. upper respiratory tract lesions, such as congenital laryngeal cartilage dysplasia, acute laryngitis, laryngeal edema, laryngeal spasm, foreign bodies in the larynx, pharyngeal tumors; 2. lower respiratory tract lesions, such as severe pneumonia, pulmonary edema, pulmonary hemorrhage, pulmonary atelectasis, pleural effusion, etc.; 3. central nervous system lesions, such as encephalitis, intracranial hemorrhage, ischemic-hypoxic encephalopathy causing central respiratory failure, which can cause shortness of breath; 4, heart disease, such as congenital heart disease, myocarditis, rheumatic cardiomyopathy, arrhythmia, etc.; 5, severe anemia can cause shortness of breath; 6, poisoning, such as organophosphorus pesticide poisoning, rodenticide, herbicide, etc.; 7, metabolic abnormalities, such as diabetic ketoacidosis, severe metabolic acidosis caused by severe diarrhea, which can cause respiratory (shortness ) difficulties.