If you swallow a piece of iron from a can, you need to go to the hospital for a chest and abdominal X-ray to determine the location of the metal foreign body, and then take a reasonable solution according to the different locations. Can ring iron piece will not be digested and absorbed, irregular shape, and easy to embedded damage throat, esophagus and gastrointestinal mucosa. Therefore, it is recommended to check in time and treat the symptoms. 1. First of all, the location should be clarified by chest and abdominal fluoroscopy or chest and abdominal X-ray film. 2. If it is embedded in the pharynx, it is necessary to go to the ENT department for foreign body removal surgery. 3. If the foreign body is embedded in the esophagus or stomach, it can be removed by gastroenterology through gastrointestinal endoscopy. 4. If a metallic foreign body enters the large intestine, there is no need to worry too much, as the peristaltic movement of the intestinal lumen, it can be eliminated in the form of stool. In the last few days, you need to observe whether there is any metal foreign body in the stool. If abdominal pain occurs during the period, you need to go to the hospital in time for examination to find out whether there is intestinal obstruction symptoms, and actively cooperate with the doctor for targeted treatment.