GASTRIC HEADACHE: Causes, Symptoms and Cure
Headaches are occasionally related to gastrointestinal (GI) issues. This can create a "chicken-and-egg" scenario in which the headache causes the GI symptoms, or the GI symptoms cause the headache. Any circumstance might be correct, according to the answer to this question. While there isn't a lot of research on the subject right now, there is...