Although the symptoms of the acutely ill child are important both in the diagnosis and follow-up of acute otitis media (AOM), data about them are quite limited. We carried out a prospective survey by collecting information on 354 consecutive children visiting a pediatrician, otolaryngologist or general practitioner because of any kind of acute symptoms to compare symptoms of children with acute otitis media with those of children with other acute infectious diseases. The symptoms and signs observed at home were recorded by the parents before the visit and the findings in the physical examination were recorded later by the physician. AOM was diagnosed in 191 patients (54.0%). The most important symptoms increasing the likelihood of AOM significantly were ear-related symptoms, such as earache (relative risk (RR) 5.4; P