What should you know about foot osteomyelitis symptoms?

Osteomyelitis is an infection in bone. In the foot, it can occur when bacteria reach bone through a break in the skin, an ulcer, surgery, or a nearby infection. Symptoms may be subtle, especially when an infection develops gradually. Tenderness over one area, reduced movement, fatigue, or a recurring wound can also matter. Symptoms alone cannot confirm the diagnosis, so an examination may be followed by blood tests or imaging.

Contact a clinician promptly if you have a deep or persistent foot wound, drainage, increasing redness, or pain that is not settling. Keep a wound clean and covered, avoid putting unnecessary pressure on it, and do not probe it or use leftover antibiotics. Tell the clinician about recent surgery, puncture wounds, diabetes, circulation problems, or immune treatment. If bone has been damaged or infection needs surgical management, [Bone Grafting](/treatments/trauma-and-fracture-care/bone-grafting/) may be discussed as part of specialist care.

Seek urgent medical care for fever with a rapidly spreading red or swollen foot, severe pain, confusion, weakness, or feeling very unwell. Immediate assessment is also appropriate if the foot turns pale, blue, or cold, or if you cannot bear weight after an injury. A foul-smelling wound or visible bone needs prompt attention.

Ask whether the wound reaches deeper tissue, what tests are needed, whether a sample should be taken, and how treatment will protect bone and foot function. Ask how to dress the wound and which activities or shoes to avoid while it heals.