After accidentally swallowing fish bones, you need to fast and abstain from drinking, go to the hospital immediately, and cooperate with the doctor for foreign body removal treatment under electronic gastroscopy. Fish spines or fish bones, especially hard, sharp fish bones, may cut the digestive tract and may even pierce it, leading to perforation. If fish bones are swallowed by mistake, perforation is dangerous and may cause hemorrhage due to injury to the adjacent blood vessels, so patients must pay attention to it and go to the hospital early.