Hiccups in the elderly belong to intractable eructation, which may be related to central nervous system diseases, or to certain gastrointestinal and cardiovascular diseases, and other etiologies such as electrolyte disorders and azotemia can also cause intractable eructation. 1. Central nervous system diseases: the more common are cerebrovascular events, such as intracranial tumors and trauma, which can present with intractable hiccups. 2. Gastrointestinal and cardiovascular diseases: gastroesophageal reflux disease and diaphragmatic hernia often manifest as intractable hiccups; myocardial ischemia, pericarditis and aortic aneurysm in cardiovascular diseases are often associated with intractable hiccups. 3. Other causes: electrolyte disorders, azotemia, hyperglycemia, and drugs (such as benzodiazepines, hormones) can affect nerve function and cause hiccups. In addition, certain operations such as intubation, gastric insufflation can also occur after the erosion. It is recommended to consult a physician to determine the cause of hiccups according to the specific condition under the guidance of a specialized physician.