Cyclic Vomiting Syndrome and Migraine

The relationship between migraine and CVS is still unclear, but medical researchers believe that the two are related. First, migraine headaches, which cause severe pain in the head; abdominal migraine, which causes stomach pain; and CVS are all marked by severe symptoms that start quickly and end abruptly, followed by longer periods without pain or other symptoms.

Second, many of the situations that trigger CVS also trigger migraines. Those triggers include stress and excitement.

Third, research has shown that many children with CVS either have a family history of migraine or develop migraines as they grow older.

Because of the similarities between migraine and CVS, doctors treat some people with severe CVS with drugs that are also used for migraine headaches. The drugs are designed to prevent episodes, reduce their frequency, or lessen their severity.

source: http://digestive.niddk.nih.gov/ddiseases/pubs/cvs/index.htm