Cyclic vomiting syndrome (CVS) is defined as discrete, sudden attacks of vomiting lasting less than 1 week and occurring three or more times per year. The vomiting may even occur on an empty stomach. There may or may not be pain associated with the vomiting. Between episodes, the individual does not experience nausea or vomiting. The diagnosis is supported by a personal or family history of migraine headaches, which is seen more commonly in children. In addition, CVS can be associated with the use of frequent hot showers or baths to control the symptoms or the use of marijuana. Though the exact mechanism of CVS is not known, many associations have been noted and symptoms are often similar to panic attacks.
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