The episodes of nausea, vomiting, and lethargy last anywhere from an hour to 10 days. An affected person may vomit several times per hour, potentially leading to a dangerous loss of fluids (dehydration). Additional symptoms can include unusually pale skin (pallor), abdominal pain, diarrhea, headache, fever, and an increased sensitivity to light (photophobia) or to sound (phonophobia). In most affected people, the signs and symptoms of each attack are quite similar. These attacks can be debilitating, making it difficult for an affected person to go to work or school.

Cyclic Vomiting Syndrome (CVS) causes episodes of nausea, vomiting, and lethargy lasting from an hour to 10 days, with potential dehydration and other symptoms.

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Cyclic Vomiting Syndrome

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