Pediatric cough is a common condition in pediatrics, with or without fever, but with severe coughing, and shortness of breath, wheezing, lack of energy, unpleasant complexion, and poor general condition; or sudden coughing with breathlessness, difficulty in whistling, and purple complexion, must be immediately sent to the hospital emergency room. Characteristics of pediatric cough: Pediatric cough is a common symptom of whistling tract disease. For the body, coughing is actually a protective reflex that removes secretions, inflammatory exudates, and foreign bodies from the whistle tract. Compared to adults, pediatric cough has many different characteristics: 1. Pediatric whistle system defenses are incomplete, the cough reflex is insensitive, and they often do not actively cough, especially not sputum, and the coughing force is weak and cannot cough up more sputum. 2, children will not consciously cough up phlegm, phlegm to the pharynx automatically swallowed into the stomach, and because children cough often accompanied by vomiting, so they vomit from the stomach is often mucus, phlegm swallowed into the stomach with the food through the entire digestive tract, and finally with the feces out of the body, so coughing infants and children more often have diarrhea symptoms. 3. Pediatric larynx, trachea and bronchi are relatively narrow, cough reflexes are insensitive, coughing power is weak, and newborns and malnourished infirm infants have even worse coughing ability, and if sputum is sticky, sputum blockage and suffocation are easy to occur. 4. Younger infants with coughing symptoms are prone to choking when drinking water and eating milk, which can be life-threatening because the milk chokes into the trachea and blocks the airway, resulting in asphyxia. In addition, when a child coughs and vomits, it is also easy to inhale vomitus causing asphyxia.