Patients should have a clear history of foreign body, and their symptoms can be divided into the following four stages: 1, foreign body into the period: patients in the food suddenly choking cough, violent paroxysmal cough and obstructed air, may appear wheezing, hoarseness, cyanosis and dyspnea. If the foreign body is small and smooth, such as melon seeds, corn kernels, etc., you can hear the sound of the foreign body hitting the vocal cords when the patient coughs, and there is a sense of vibration when the hand is placed in front of the laryngotrachea. If the foreign body is large, blocking the trachea or near the tracheal branches of the bulge, can make both sides of the main bronchial ventilation is severely impaired, so serious respiratory distress, and even asphyxia, death. 2.Quiet period: If the foreign body is small and not very irritating, or if the foreign body enters the bronchus through the trachea, the symptoms of coughing and breath-holding can be very mild or even disappear for a period of time. And there is a long or short asymptomatic period, so that the diagnosis is easy to neglect. 3.Irritation or inflammation period: Plant-based tracheal foreign body contains free acid, so it has obvious irritation effect on tracheal mucosa. Legume tracheal foreign body, after absorbing water, swells, so it is easy to occur airway obstruction. The longer the foreign body remains in the airway, the more severe the reaction. Initially, it is an irritating cough, followed by persistent cough, pulmonary atelectasis or emphysema due to increased secretions in the trachea and swelling of the tracheal mucosa. 4.Complication period: The foreign body can be embedded in one side of the bronchus, and after a long time, it will be wrapped by granulation or fibrous tissue, causing bronchial obstruction and easily causing secondary infection. Long-term tracheal foreign body, there are similar to the clinical manifestations of septic bronchitis: coughing sputum with blood, pulmonary atelectasis or emphysema, causing respiratory distress and hypoxia. Treatment: The longer a tracheal foreign body stays, the more dangerous it is, so once it occurs, go to the hospital immediately. They should generally be removed as soon as possible to avoid or reduce the chances of choking and other complications. Prevention: Young children’s tracheal foreign bodies directly endanger life safety, so parents should be fully aware of the dangers and pay attention to the prevention of young children’s tracheal foreign bodies. Once a tracheal foreign body occurs in a child, parents should not take any chances and should immediately rush the child to the hospital for treatment. This is because the chances of young children coughing up foreign bodies naturally are rare, and only in the conditions of the hospital operating room can foreign bodies be removed with a laryngoscope or tracheoscope. Therefore, parents must realize the importance of timely treatment and must not lose time, otherwise the consequences are unthinkable. To prevent the occurrence of foreign bodies in the trachea of young children, avoid crying, laughing, running and jumping when they eat, and chew and swallow slowly. At the same time, do not give young children to eat fried beans, peanuts, melon seeds and other food that is not easy to chew, and do not force feed medicine, which can easily cause the occurrence of foreign bodies in the trachea of young children. In addition, avoid storing small items, such as small buttons and pins, in the toddler’s activity area to prevent accidents. Prevention of foreign bodies in the trachea is the key!