A fish spike lodged in flesh cannot be decomposed. The main component of the fish spike is calcium, and if it is lodged in the esophagus or throat, it is likely to cause local infection. If the site is close to the aortic arch, there is a risk that the fish spike may penetrate the artery, in which case a chest CT is required. If the fish spike is lodged in the stomach, there is no need to worry because the stomach is highly acidic and will break down the fish spike and digest it, so don’t worry about it. If the fish spike is in the esophagus or throat, it is necessary to use prophylactic antibiotics for 1-2 days to prevent infection after the fish spike is removed.