3yo daughter's leg been hurting several days; no trauma to it. has 102.5 fever. call in to dr. what could we be looking at? or what should we look 4?

Could be serious.: The combination of fever and leg pain suggests a long list of diagnoses; thankfully the most serious are quite rare. Infections of the bone or joint are more rare than previously, but do occur. Do see the doc asap and note: recent cold, flu, or sore throat, prior episodes, rashes, pallor, bruising, abdominal complaints or diarrhea.