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. The correct eating habits of the foreign body impact can be heard at the trachea: 1. Chew and swallow slowly when eating, should not be too hasty. Elderly people who have lost more teeth or use denture trays should pay particular attention. Damaged dentures should be repaired in time to avoid loosening and falling off when eating and accidentally swallowing as a foreign body. 2.Educate children to correct the bad habit of holding small playthings in the mouth to prevent inadvertent swallowing. 3.Patients with general anesthesia or coma should have their movable dentures removed. 4.After accidentally swallowing a foreign body, do not swallow rice balls, steamed buns, fei cai and other foods on your own, so as not to aggravate the injury and increase the difficulty of surgery. 5, accidental swallowing of foreign bodies should be promptly consulted, early diagnosis, removal of foreign bodies, to prevent the occurrence of complications have an important role.