Diabetic Foot Infections

About Diabetic Foot Infections

Diabetic foot infections range from superficial cellulitis to deep abscesses and bone infection. Common features include redness, swelling, warmth, pain, discharge and fever. Patients with poor sensation may feel little pain, so visible signs and systemic features must be assessed carefully. Early review supports prompt ulcer surgery decisions, before infection extends through tissue planes or into bone.

Initial assessment includes wound examination, pulses, sensation and bloods (white cell count, CRP, kidney function and HbA1c). Tissue or bone samples are sent for culture before antibiotics where possible. Imaging with X-ray, MRI or sometimes nuclear scans helps identify osteomyelitis. Empirical antibiotics are started and refined once culture results are available, in coordination with infection specialists where needed.

Wound debridement is a cornerstone of treatment. Dead skin, fat, fascia and bone are removed in theatre, often in repeated sessions until the wound is clean. This is much more effective than antibiotics alone, particularly when there is dead tissue or thick discharge. Foot reconstruction is then planned once infection is controlled and the wound bed is healthy enough to support surgery.

Reconstructive options include direct closure, skin grafts, local flaps and free flaps depending on wound size, location and exposed structures. Weight-bearing areas of the foot need durable cover that tolerates pressure and shoe wear. Where toes or parts of the foot are not salvageable, careful amputation planning preserves walking function and supports later orthotic or prosthetic fitting.

Coordinated diabetes care is essential. Blood sugar, nutrition, anaemia, kidney function and circulation are reviewed and optimised. Smoking cessation is strongly encouraged. Patients with significant arterial disease are referred to vascular specialists for assessment and possible revascularisation, since wound healing depends on adequate arterial inflow. Compression and offloading footwear are added once infection has settled.

Long-term follow-up continues at our diabetic foot clinic. Reviews track wound healing, sensation, pulses and footwear. Family education on daily foot inspection and care reduces recurrence. Patients with previous infections remain at higher long-term risk, so structured review and quick access for any new wound are part of our standard pathway after diabetic foot infections treatment.

What to expect

• Detailed wound, vascular and metabolic assessment
• Tissue and bone cultures before antibiotic refinement
• Imaging to identify osteomyelitis or deep abscess
• Theatre debridement, often staged over several sessions
• Reconstruction with grafts, local flaps or free flaps
• Long-term follow-up with focused diabetes care

Recovery

• Hospital stay matched to severity, often one to three weeks
• Strict offloading once infection is controlled
• Targeted antibiotics adjusted to culture results
• Pressure-relief footwear and orthotics for healed feet
• Periodic follow-up to detect new wounds early