Stomach pain can cause headache is mostly seen in stomach cramps, food poisoning, gastrointestinal cold and so on. 1. Stomach cramps: may be due to the stomach by cold air stimulation or stomach cold, will have a certain impact on the smooth muscle of the stomach, resulting in stomach smooth muscle contraction, causing stomach cramps, resulting in a pulling neurological headache. 2. Food poisoning: mostly caused by eating food contaminated by bacteria, poisonous substances or toxins, patients often experience abdominal pain, diarrhea, headache, nausea, vomiting and other symptoms. 3. Gastrointestinal cold: a kind of cold, often caused by viral infections, the patient will appear diarrhea, nausea, vomiting, abdominal pain and other symptoms, often accompanied by fever, which causes headaches. Tummy ache can cause headache may also be caused by other reasons, it is recommended to go to the hospital in time, clear cause after targeted treatment.