Gastroparesis is a delay in stomach emptying without a known blockage or obstruction. This causes nausea, vomiting and abdominal pain and many of these symptoms overlap with migraine. A study found that stomach emptying was delayed in people with migraine.1 Delayed gastric emptying and vomiting can affect the absorption and efficacy of migraine medications.

Another study found that out of 511 people with gastroparesis 36.6% reported having migraine attacks.