Previous studies have evaluated the clinical features and characteristics of migraine in selected children attending hospital clinics. There have, however, been no community studies on the prevalence and characteristics of migraine in children aged 3-11 years in British general practice. In this study, a total of 1,083 children (from 1,104 registered with a general practice) and their parents were interviewed. Possible migraine sufferers took part in an extended interview that assessed various characteristics of the patients and their attacks. The survey showed that migraine attacks started in infancy, and migrainous children were more likely to have mothers with migraine. Some clinical features were found to be age-dependent. Compared with similar hospital surveys there was a lower frequency of attacks recorded but the prevalence of aura was similar to that found in previous studies.