It is possible to swallow a fish spike in the stomach if it is accidentally mixed in with food. If a fish spike is lodged in the stomach, usually the patient will experience nausea and regurgitation, acid reflux, and heartburn. In patients with previous upper gastrointestinal disorders, such as previous gastrointestinal bleeding or significant gastroduodenal ulcers, nausea and vomiting accompanied by vomiting of blood may also occur. If a fish spike is lodged in the stomach, further examination must be done by gastroscopy in the hospital, and the fish spike can be removed simultaneously under the guidance of an electronic gastroscope.