E.R. Trip. This is something that needs to be assessed by a physician, likely in the emergency department. Appendicitis will tend to present with abdominal pain, fever, nausea/vomiting. However, abdominal pain can be so many different things, it's best for a doctor to evaluate the child.
Early screening. The appendix usually lays next to the inside part of the right groin muscle. When inflamed, kids have difficulty walking upright, or hopping on either leg without > belly pain. I have parents evaluate both when they call the service after hours. If the kid is running around & playing I don't worry so much. When unsure, the best test is an exam by a trained physician & then I'm not always sure.