What should you know about bone cellulitis?

Cellulitis often causes a spreading area of red, warm, swollen, tender skin. A cut, ulcer, insect bite, surgery wound, or skin problem such as Athlete's Foot can provide an entry point for bacteria. The infection may occur over a joint or near a bone, but that location alone does not prove that the bone is infected.

Bone infection, called osteomyelitis, is a different problem. A clinician may consider it when pain is deep or persistent, a wound is slow to heal, or infection is close to exposed bone. Examination and sometimes blood tests or imaging help distinguish these conditions. Type 2 Diabetes and poor circulation can make foot wounds more concerning.

Arrange same-day medical assessment for a new, expanding, hot, painful, or swollen area, especially if it is near a wound, ulcer, joint, or implanted material. Treatment may require prescribed antibiotics and care of the entry wound. Take medicine exactly as directed and do not use leftover antibiotics or stop early because the skin looks calmer.

Keep any wound clean and covered as advised, avoid squeezing the area, and note whether redness is spreading. A clinician may mark the edge of redness to monitor change. Do not delay assessment while waiting for home remedies to work.

Go to urgent care for severe or rapidly worsening pain, confusion, faintness, fast breathing, marked weakness, or a high Fever. These may indicate a serious infection, including Sepsis. Immediate review is also needed for blackened skin, numbness, pus, red streaks, inability to move a nearby joint, or a diabetic foot wound with increasing redness or swelling.

Ask whether the infection is limited to skin or could involve deeper tissue or bone, what examination or imaging is needed, which antibiotic is appropriate, and how the wound should be dressed. Ask which changes mean you should return urgently and how diabetes or circulation affects follow-up.