Hematogenous osteomyelitis is a fierce disease, and misdiagnosis and mistreatment can lead to serious sepsis, osteonecrosis, pathological fractures, and other serious consequences. When a child has redness, swelling, and pain in the affected area with high fever after a minor trauma, he or she should be alerted to hematogenous osteomyelitis, and often these children have a recent history of colds and flu, and the laboratory blood picture will be significantly elevated, and there are no obvious changes at the beginning of the plain film. It is only after 1 week that the plain film will show periosteal reaction and bone destruction. Early MRI examination will show obvious signal abnormality, which is better for diagnosis, and the diagnosis can be confirmed by MRI examination of suspected abscess formation sites, and experienced physicians can extract pus through puncture examination, and early detection of those without dead bone formation and extensive bone destruction.