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 of foreign body impact can be heard at the trachea tapping sound: 1. It is best not to give children under five years of age to eat melon seeds, peanuts, beans and other foods. You can remove the melon seeds first when eating watermelon. Eating to avoid talking, laughing, crying or scolding children. To change the bad habits of walking and playing while eating, so as not to cry once you fall cross, the food in the mouth inhaled into the lower respiratory tract. Take care of your child and educate older children not to feed them food such as melon seeds, peanuts and beans. Be careful not to let the child take these foods by himself. 2. Teach children not to put small toys in their mouths, and try to take them out in time when they find something in their mouths. But do not forcibly seize, so as not to cry after inhalation. 3.Adults should change the habit of biting pins, nails and other things in the mouth when working to prevent accidents. For patients who are unconscious or not awake after general anesthesia, careful care should be taken: remove the shaken dentures in advance, and when vomiting, the head should be turned to one side so that vomit is not inhaled into the lower respiratory tract.