Near the end of the day, nurse Xiao Liu brought in a three-year-old girl, followed by the girl’s parents. This is a cute little angel, but her eyes are shining with tears, who has provoked her? According to her parents, the child is usually quite well behaved, and good health, is greedy, often eat some bush flowers, peanuts, melon seeds, candy. That day they returned from shopping and found their daughter alone at home with no energy and coughing incessantly. The parents gave her cough medicine from experience, but it did not help much. Later they went to a clinic, where the doctor said it was a “cold” and gave her a “drip”, but the girl’s cough got worse and worse. The parents were so anxious that they brought her to me. After a physical examination, blood tests, and films, I found nothing serious, so I told them to take some medicine back for observation. I didn’t expect that soon after leaving, the family came back in a frenzy. The child was coughing violently again, and her face was red. I took another film of her in a different position, but I still couldn’t see any problem with her heart and lungs. Could it be a throat problem? I contacted the ear, nose and throat department for a consultation. But after examination, the child’s throat was normal. That’s strange! I was deep in thought. When I was at a loss, I heard another violent cough from the girl. This time I found that her cough was very regular, each time a sudden attack, and lasted for a while and then stopped. …… Thinking of this, I immediately took her straight to the radiology department and gave her an X-ray fluoroscopy. On the monitor, the girl’s chest did not appear to be abnormal. Suddenly, she issued a spasmodic violent cough, breathing suddenly sharply. In a flash, I noticed that there was something about a centimeter long in her trachea, moving up and down with her breathing. After a lot of trouble, the ENT doctor took it out with a bronchoscope and found that it was a melon seed shell that had been swollen with mucus. Readers may ask, since it is a foreign body in the trachea, how come the film did not find? It turns out that the melon, peanuts and other foreign bodies of low density, volume and small, the top of the film found by the trachea, bronchial foreign bodies caused by pneumonia, pulmonary atelectasis, it is difficult to directly find foreign bodies. The X-ray fluoroscopy has the advantage of dynamic observation, may directly find foreign bodies, or find foreign bodies caused by mediastinal oscillation, thus providing a direct basis for clinical removal of foreign bodies. Melon seeds and peanuts are often a common food item for people. Here, I would like to remind those careless parents, when children eat those easy to “stuck in the throat” food, such as melon seeds, peanuts, to pay more attention to ah!