If a fish spike is accidentally swallowed while eating, it depends on the specific situation: 1. If the fish spike is small, it will not lodge in the internal organs, and the tiny fish spike will enter the stomach with the food, be softened by the digestive juices in the stomach, and finally be discharged with the food residue, which is not dangerous. 2. If the fish spike is thicker or larger, it is easy to be embedded in the esophagus wall, which may cause infection, ulcer, or even perforation. 3. If a patient with cirrhosis has varices in the esophagogastric fundus due to portal hypertension, swallowing a larger fish spike may scrape the blood vessels and cause upper gastrointestinal bleeding, so be sure to chew slowly when eating fish to avoid swallowing the fish spike. If a larger fish spike is swallowed along with symptoms such as pain, nausea, blockage sensation and vomiting of blood, you should go to the hospital promptly for examination to avoid serious consequences.