Osteomyelitis (Bone Infection)

What is osteomyelitis?

Osteomyelitis is an infection within the bone. In children it usually arrives via the bloodstream from another source — sometimes one that was very mild — and tends to settle near the growth plates of long bones, particularly around the knee.

It's an uncommon but important diagnosis. Without prompt treatment, it can damage the bone, cause systemic illness and in some cases lead to long-term consequences. With timely management, the great majority of children recover well.

The challenge is often making the diagnosis. The early picture can resemble a number of other conditions, and a degree of clinical suspicion is needed to investigate appropriately.

What does it feel like?

Common features include:

• Pain in the affected bone, often worsening over days

• Reluctance to use or weight-bear on the limb

• A limp

• Fever or feeling generally unwell

• Tenderness, sometimes warmth or swelling over the area

The combination of bone pain, fever and reluctance to weight-bear is the classic alarm picture and warrants urgent assessment.

How is it diagnosed?

Diagnosis combines clinical assessment with investigations. Blood tests typically show raised inflammatory markers. Imaging plays a central role: MRI is the most useful early on and can show changes well before they appear on X-rays.

In some cases, a sample is taken from the affected bone — either with a needle or surgically — to identify the responsible organism and tailor antibiotic treatment.

Septic arthritis (joint infection) and other diagnoses are part of the differential and need to be specifically considered.

What are the treatment options?

The mainstay of treatment is a prolonged course of antibiotics, typically starting intravenously and stepping down to oral. Surgery is sometimes needed — particularly if there's a collection of pus that needs draining, or if the infection isn't responding to antibiotics alone.

Recovery is usually steady but takes weeks. Most children make a complete recovery with timely and appropriate management. Nev will work through the right plan for your child at your consultation.

When should you seek urgent help?

Seek urgent assessment if your child has:

• Bone pain alongside fever or feeling generally unwell

• A persistent limp or refusal to weight-bear

• Tenderness, warmth or swelling over a specific area of bone

• Symptoms that are worsening over days

• Any combination of these features without a clear explanation

Bone infections in children are time-sensitive. If there's any doubt, a prompt assessment is the right path.