Hiccups can be a symptom of stomach cancer, but they are not a specific manifestation of stomach cancer, so whether frequent hiccups are a precursor of stomach cancer depends on the specific situation. Hiccups, commonly known as “belching”, are caused by spasm of the diaphragm, and the gas in the stomach reverts upward from the stomach, resulting in a sharp and short sound in the throat, which is usually a normal physiological reaction. Frequent belching may be caused by drinking too much carbonated beverages, overeating or eating cold and stimulating foods. Belching caused by gastric cancer is prolonged. When the cancerous tissue invades the diaphragm or phrenic nerve, prolonged belching may occur, usually lasting for more than ten hours and not relieved even after taking anti-diaphragmatic drugs, and may be accompanied by uncomfortable symptoms such as epigastric fullness, nausea and vomiting. Early stage gastric cancer usually has no obvious clinical symptoms, so when frequent hiccups occur, it should be taken seriously and gastroscopy can be performed in gastroenterology department to exclude the possibility of organic lesions.