When a baby swallows a foreign body, some will have abnormal symptoms immediately, while some will have discomfort symptoms only after half an hour or longer. There is no fixed time, and it needs to be analyzed according to the size of the foreign body and other circumstances. The size and shape of different foreign objects may vary, and the part of the body where the foreign object is swallowed is also different. There is no fixed time for the discomfort to appear, some will have abnormalities immediately, while some need to wait for half an hour or even a few days before they will have discomfort. If the foreign body is relatively large, it may be directly blocked in the airway after swallowing, affecting the patient’s respiratory function and immediately causing breathing difficulties and suffocation; If the foreign body is small and rounded, it may not cause adverse effects on the body, and there will be no obvious clinical manifestations; If the foreign body has sharp corners, it may scratch the digestive tract and cause abdominal pain and blood in the stool. It is very dangerous for babies to swallow foreign objects, parents need to observe closely after discovery and go to the hospital in time to remove the foreign object.