What should you know about non bacterial osteomyelitis?

Osteomyelitis usually describes inflammation involving bone, but the word does not by itself prove that bacteria are responsible. In a non-bacterial form, inflammation may be sterile or linked with an immune-system disorder. Pain, tenderness, swelling and reduced use of the nearby limb can occur, and symptoms may come and go. Similar features can also result from injury, a tumour or infection, so clinicians may combine examination with blood tests and imaging. Sometimes a sample is needed to clarify the cause.

Book medical review for persistent focal bone pain, swelling or difficulty using an arm or leg. Bring information about fevers, skin problems, bowel symptoms, joint pain, previous injuries and medicines. Follow the recommended plan rather than treating presumed infection or inflammation on your own. Depending on the findings, care can include activity modification, pain control, medicines aimed at inflammation, monitoring, or specialist input. Surgery is not automatic; procedures such as [Bone Grafting](/treatments/trauma-and-fracture-care/bone-grafting/) are considered only for selected structural problems.

Seek urgent care for severe rapidly increasing bone pain, a new inability to bear weight, marked swelling, high fever, confusion, or feeling acutely unwell. Get prompt advice if a wound near the painful area becomes red, warm or draining, or if symptoms worsen quickly. These signs can overlap with infection or a serious structural problem and should not be explained away by the word non-bacterial.

Ask: How was infection assessed? What other conditions need exclusion? Which scan or sample would clarify the diagnosis? What activity limits are sensible? How will we monitor bone strength and treatment response?