The chance that stomach pain can cause headache is relatively low, but stomach pain can cause nausea, vomiting, bloating or abnormal stool, so if stomach pain and headache occur at the same time, consider whether it is a concomitant symptom or two different symptoms, different diseases occurring at the same time. The pain is accompanied by nausea and vomiting. If a headache occurs, it may be a sign of infection or electrolyte disorder, or acute gastroenteritis, etc. It is recommended that a differential diagnosis be made to prevent the disease from being missed because it is simply caused by stomach pain, resulting in further development of the disease.