Cyclical vomiting syndrome: diagnosis and management Cyclical vomiting syndrome is characterised by episodes of sudden onset nausea and vomiting in an otherwise healthy child. Dr Louise Newson discusses diagnostic criteria and management. by Dr Louise Newson Sign in to continue Sign In Email address Password Stay signed in Trouble signing in? Reset password: Click here Need help? Email us Register FREE Limited free articles a month Free email bulletins Register Now Register Now Take a 30-day trial Join MIMS now and pay nothing for the first 30 days Join GPOnline now and pay nothing for the first 30 days Sign Up Sign Up