The tapping sound of foreign body impact can be heard at the trachea is the tapping sound of foreign body impact on the tracheal wall and subglottic area at the end of expiration, which is one of the symptoms of foreign body in the trachea, and the foreign body is just inhaled, mainly choking and coughing. Later, the active foreign body moves with the airflow and can cause paroxysmal cough and dyspnea. The larynx has a rich distribution of nerves, and when stimulated by choking and other inadvertent foreign bodies, it produces a defensive firing cough, forcing the foreign body out, which plays a role in protecting the lower respiratory tract. Choking or throat tickling in children is more dangerous than in adults. Prevention methods of foreign body impact can be heard at the trachea tapping: 1. First, children should be taught not to develop the habit of holding objects in their mouths. When children have food in their mouths, do not tease them to cry, laugh, talk or scare, but patiently persuade them to spit it out and do not scold them to prevent them from inhaling the food into their trachea. If the child is already crying, he or she should not be forced to eat again, otherwise foreign objects may easily enter the respiratory tract. Put small items that children can easily inhale in places where children can’t reach them, and toys should be safe. 2.When a child vomits, his head should be tilted to the side so that he can easily vomit, lest he inhale the trachea. 3.If there is a foreign body in the pharynx, never use your fingers to scoop it up, and do not use the method of swallowing large pieces of food to press down the foreign body, you should try to induce it to spit out. 4, children under 3 years of age should try to eat less dried fruits, beans, parents and caregivers should pay attention to children, do not give melon seeds, peanuts and other foods to children. 5. When breastfeeding young children with a bottle, you should pay attention to the rubber nipple orifice not being too large, prevent sucking milk too quickly, over-flush, do not feed too many times or feed too much milk, do not let the baby cry too much before feeding, do not suck on the fake nipple with eyes, and make the milk in the bottle full of milk when feeding. Doing this can prevent your baby from inhaling too much air in the stomach and causing vomiting. In addition, do not turn your baby too early after feeding, it is best to put your baby upright and gently pat his back to make him burp a few times before putting him back to bed, so that he is less likely to vomit. It is best to raise the head of the bed after feeding the child who is prone to vomiting, and sleep on the side of the head to prevent asphyxiation or aspiration pneumonia and tracheal foreign bodies when vomiting occurs. 6, once found that children suddenly choking and coughing after eating, playing, followed by better, need to pay attention to the hospital in time to avoid delaying the disease.