The frequent incidence of nausea and vomiting in people with migraines has led to the idea that both migraines and gastroparesis may arise from autonomic nervous system dysfunction. Gastroparesis during a migraine is thought to be caused by increased sympathetic nervous system activity, a decreased parasympathetic system (via the vagus nerve), or both. Gastroparesis may then hamper migraine treatment by causing the person to delay taking their migraine medication.
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