Hiccups after gastroenteroscopy are considered to be caused by diaphragmatic spasms, and may be related to diseases if they occur over a long period of time. Gastroenteroscopy is a common test for patients suffering from bloating, abdominal pain, gas, acid reflux and other digestive disorders. If hiccups occur after gastroenteroscopy, they may be caused by diaphragmatic spasm and slowing down of gastric peristalsis, which can be relieved after rest. If the hiccups are long-lasting, it should be considered that they are caused by brain tumor, encephalitis and other central diseases, which are often accompanied by dizziness, headache, nausea and other symptoms; however, they may also be caused by esophagitis, mediastinal tumors, gastritis, etc., which are often accompanied by abdominal pain, abdominal distension, postprandial discomfort, nausea and other symptoms. If the hiccups continue to be unrelieved, it is recommended to consult a doctor in a timely manner, under the guidance of the doctor to clarify the cause of the disease and targeted treatment.