Research has found a rise in the number of children taken to A&E departments of English hospitals with common illnesses.
Experts in Nottingham have noted a 42% increase in the decade to 2008.
Ten common medical problems account for 85% of visits, including breathing difficulties, fever, stomach upsets and coughing.
It is being blamed on patchy out-of-hours care across England.
The study was carried out by experts from Nottingham Children's Hospital and the University of Nottingham Medical School, and published in the Emergency Medical Journal.