• Cyclic vomiting syndrome is a disorder that causes recurrent episodes of nausea, vomiting, and tiredness (lethargy). 
• The episodes of nausea, vomiting, and lethargy last anywhere from an hour to 10 days. 
• Vomiting several times leads to severe dehydration. 
• Cyclic vomiting syndrome is likely the same as or closely related to a condition called abdominal migraine, which is characterized by attacks of stomach pain and cramping. Attacks of nausea, vomiting, or abdominal pain in childhood may be replaced by migraine headaches as an affected person gets older. Many people with cyclic vomiting syndrome or abdominal migraine have a family history of migraines.

Click here to learn more about CVS https://www.niddk.nih.gov/health-information/digestive-diseases/cyclic-vomiting-syndrome/definition-facts#what