Cyclic vomiting syndrome
(重定向自Cyclical Vomiting Syndrome)
Cyclic vomiting syndrome (US English) or cyclical vomiting syndrome (UK English) (CVS) is a chronic functional condition of unknown etiology characterised by recurring attacks of intense nausea, vomiting, and sometimes abdominal pain, headaches, or migraines. CVS typically develops during childhood, usually between ages 3 and 7; although it often remits during adolescence, it can persist into adult life.