Bone & Joint Infections

A bone or joint infection — osteomyelitis when it involves bone, septic arthritis when it involves a joint — occurs when bacteria, mycobacteria or fungi reach the skeleton through the bloodstream, an injury, or surgery, and it usually needs prolonged, precisely targeted treatment to prevent permanent damage.

These infections are often slow to declare themselves. Pain deep in a bone that persists for weeks, or a single joint that becomes hot and swollen, are the presentations that should not be waited out.

Symptoms of bone and joint infections

• Deep, persistent bone pain, often worse at night
• A single joint that is hot, swollen, painful and difficult to move
• Fever alongside localised pain in a limb or the spine
• Inability to bear weight, or a marked new limp
• A wound, ulcer or discharging sinus over a bone
• New pain around a joint replacement or metal implant, at any time after surgery

When should you see a specialist for a bone or joint infection?

• A single acutely hot, swollen, painful joint — this needs urgent assessment, ideally the same day
• Pain around a prosthetic joint or orthopaedic implant, with or without fever
• Back pain with fever, or back pain with new leg weakness or numbness
• A wound over bone that is not healing, or a diabetic foot ulcer deep enough to probe to bone
• Bone or spine pain with weight loss and night sweats, where tuberculosis is a possibility
• An infection that has recurred after a previous course of treatment

Frequently asked questions about bone and joint infections

What is the difference between osteomyelitis and septic arthritis?

Osteomyelitis is infection within the bone itself. Septic arthritis is infection inside a joint space. They can occur together, particularly when infection spreads from bone into an adjacent joint.

Why does treatment take so long?

Bone has a limited blood supply compared with soft tissue, so antibiotics reach it less readily and infection is slower to clear. Courses are therefore measured in weeks rather than days, and stopping early is a common reason infections return.

Does an infected implant always have to be removed?

Not always. It depends on how long the infection has been present, which organism is involved, and how well the implant is fixed. This is a decision made jointly with the orthopaedic team after assessment, not a foregone conclusion.

Is tuberculosis of the bone or spine still seen in India?

Yes. Spinal tuberculosis in particular remains an important cause of prolonged back pain with fever and weight loss, and because it progresses gradually it is often mistaken for a mechanical problem for months.

How is the responsible organism identified?

Usually by obtaining a sample from the affected bone, joint fluid or tissue, alongside blood cultures and imaging. Identifying the organism is what makes targeted treatment possible, which is why samples are ideally taken before antibiotics are started where it is safe to wait.

Conditions related to bone and joint infections

Where fever persists without an obvious source, see Fever of Unknown Origin. Infections involving implanted cardiac hardware follow similar principles — see Cardiac Device Infections. Bone and joint infections behave atypically under immunosuppression; see Transplant Related Infections.

Our infectious disease specialist follows a comprehensive diagnostic approach using detailed history, clinical examination, and advanced investigations to identify the root cause and provide effective treatment.