Burping once eating is not necessarily an early symptom of stomach cancer, and it may be related to dietary factors, mental factors, other stomach diseases and so on. 1. Dietary factors: Eating food too fast or eating too much gas-producing food, such as potatoes, sweet potatoes, etc., can lead to hiccups. 2. Mental factors: mental tension can easily lead to sympathetic nerve excitement and spasm of diaphragm, thus causing hiccups. 3. Stomach diseases: such as gastritis, gastric ulcer, etc. often lead to digestive function is affected, and easy to lead to the phrenic nerve stimulation, thus causing hiccups, of course, do not rule out the possibility of stomach cancer. The above symptoms may also be related to other causes, such as central nervous system diseases, etc. If the symptoms continue to be unrelieved, it is recommended to consult a doctor in time, under the guidance of a professional physician to identify the causes and give targeted treatment to avoid delaying the condition.