A foreign body in the trachea is one of the common acute and critical conditions in the pentatology department and is prone to occur in children under 5 years of age. Its severity depends on the nature of the foreign body and the degree of tracheal obstruction caused. In mild cases, it can cause tracheal and lung damage, and in severe cases, death by asphyxiation. The source of the foreign body is endogenous (i.e., from the child itself), such as vomitus, respiratory blood clots, purulent secretions, respiratory pseudomembranes, etc. Exogenous foreign bodies refer to various objects (liquid and solid) inhaled through the mouth, with solid foreign bodies causing relatively large and significant damage. What are the manifestations of foreign body inhalation? If a foreign body is inhaled, how should parents resuscitate it in the first instance outside the hospital? With questions, parents please continue to read on. Foreign body inhalation performance: 1, foreign body into the trachea at the early stage: the child is generally disturbed when eating suddenly appear violent choking and infarction performance, followed by hoarseness, wheezing, lip cyanosis and breathing difficulties. Small and relatively smooth foreign bodies, such as sunflower seeds, peanuts, soybeans, etc., can be heard when the child coughs and the foreign body strikes the sound door upward, and there is a vibration sensation when the hand is placed in front of the trachea. Foreign body larger obstruction of the trachea or bulge, can cause pulmonary ventilation disorders, manifested as breathing difficulties and asphyxia, if not timely removal of foreign bodies to restore ventilation can cause death. 2. Quiet period: If the foreign body is small, or if the foreign body enters the bronchus, it can be manifested as coughing and wheezing for a period of time, or even no performance in mild cases. Therefore, children in this period are easy to miss the diagnosis. 3. Inflammatory period: The inhaled foreign body stimulates inflammation of the tracheal mucosa in the airway, or blocks the small airway, resulting in irritating cough or wheezing. With the prolongation of foreign body embedded time, the local inflammatory response is strengthened, the secretion in the trachea is increasing, the swelling of tracheal mucosa is aggravated, and persistent cough, pulmonary atelectasis or emphysema may appear. 4. Complication period: foreign body embedded in one side of the bronchus for a long time will be wrapped by granulation or fibrous tissue, causing bronchial obstruction. The airway obstruction and poor sputum drainage can easily lead to secondary bacterial infection and fever performance. Gradually, fever, cough, wheezing, and blood in sputum may appear, and dyspnea and cyanosis may start when pulmonary atelectasis and emphysema appear. First aid measures: When parents find that the child suddenly appears violent choking and coughing during feeding, followed by hoarseness, wheezing, cyanosis and respiratory distress, they should think of the possibility of foreign body aspiration. The principle of the Heimlich maneuver is to use the impact on the abdomen – the soft tissue under the diaphragm to generate pressure from the bottom to the top, compressing the lower part of both lungs, thus driving the residual air in the lungs to form an impacting airflow and expelling the solid foreign body blocking the trachea and larynx. 1, the child is awake and can stand using the standing method: the rescuer holds the child’s abdomen from behind, holds a fist with one hand and places the thumb side slightly above the child’s belly button. The other hand holding the hand of the fist, rapid impact to the upper abdomen, repeatedly rhythmically and forcefully. The child does the corresponding cooperation, head slightly lowered, open mouth in order to spit out the foreign body. 2. When the child is in a coma and cannot stand, he/she should be placed in a supine position. Parents kneel on the ground on the outside of the child’s thighs with their legs apart, fold their hands and hold the root of the palms of their hands slightly above the child’s belly button for impactful, fast and strong pressure forward and upward. Then open the jaws, and if a foreign body is flushed out, quickly pull out and clean the mouth. 3, infant and child tracheal foreign body: parents take a sitting position, let the child sit with his back on the family’s lap. Then use both index and middle fingers to squeeze the child’s upper abdomen from behind and above, and relax immediately after pressing. You can also square the child on his back, and the parents use the above method to squeeze. 4, self-help: If the child chokes into the trachea foreign body, no one else is present, immediately use their hands or the back of a chair, the edge of the table against the upper abdomen, rapid and violent squeeze, pressure immediately after relaxation, sometimes foreign bodies can be discharged from the trachea. As long as people find children choking violently, breathing difficulty and bruising performance when eating in the first place, the first thing to think about is foreign body in the trachea. And the first time to rescue, but also to minimize the danger of the child. If the child has a history of choking on food, has a prolonged cough and wheezing, and the general anti-infection treatment does not relieve the cough and wheezing, he or she needs to be alert to the possibility of a foreign body in the trachea. This requires a high resolution CT chest (HRCT) + 3D reconstruction of the airway or bronchoscopy to help diagnose the problem. In adults, if a foreign body is present, the treatment is similar.