Every 20 seconds, somewhere in the world, a person loses a leg due to diabetes.
Diabetic foot complications—ulcers, infections, and amputations—are devastating but largely preventable. The 2025 ADA guidelines emphasize that comprehensive foot care and regular screening can prevent most diabetes-related foot problems.
Here's what you need to know to protect your feet.
Diabetes creates several problems that affect foot health:
| Problem | Effect on Feet |
|---|
| Peripheral neuropathy | Loss of protective sensation |
| Peripheral artery disease | Poor blood flow, delayed healing |
| Immune dysfunction | Increased infection risk |
| Foot deformity | Abnormal pressure points |
| Callus formation | High-pressure areas prone to breakdown |
Neuropathy → Loss of sensation → Unrecognized trauma →
Callus formation → Skin breakdown → Ulcer →
Poor healing (circulation) → Infection →
Amputation (if not treated early)
Key insight: The process starts silently. You may not feel the initial injury because of neuropathy.
| Risk Factor | Why It Increases Risk |
|---|
| Peripheral neuropathy | Can't feel injuries |
| Peripheral artery disease | Poor wound healing |
| Previous ulcer or amputation | High recurrence risk |
| Foot deformity | Abnormal pressure distribution |
| Poor glycemic control | Impairs healing and immune function |
| Diabetes duration | Longer disease = more damage |
| Smoking | Worsens circulation |
| Visual impairment | Can't see foot problems |
| Mobility issues | Can't examine feet properly |
| Risk Category | Characteristics | Follow-Up |
|---|
| Low risk | No neuropathy, no PAD, no deformity | Annual foot exam |
| Increased risk | Neuropathy or PAD or deformity | Every 3-6 months |
| High risk | Previous ulcer, amputation, or multiple risk factors | Every 1-3 months |
| Active ulcer | Current wound | Immediate specialist referral |
| Patient Type | Recommended Frequency |
|---|
| All patients with diabetes | Annual comprehensive foot exam |
| High-risk patients | Every 3-6 months |
| Pregnant women with diabetes | Each trimester |
| After callus debridement | Every 1-2 weeks until healed |
| Component | What Is Checked |
|---|
| Skin inspection | Cuts, sores, redness, calluses |
| Musculoskeletal | Deformities, joint mobility, gait |
| Neurological | Sensation (monofilament, vibration) |
| Vascular | Pulses, capillary refill, skin temperature |
| Footwear | Shoe fit and condition |
Check your feet every day for:
| What to Look For | Why It Matters |
|---|
| Cuts, scratches | Can become infected |
| Blisters | May indicate shoe problems |
| Redness | Possible infection |
| Swelling | Possible injury or infection |
| Bruising | Possible trauma |
| Ingrown nails | Can lead to infection |
| Calluses | Can lead to ulcers |
| Drainage on socks | Sign of ulcer |
Tip: Use a mirror or ask someone to help if you can't see the bottoms of your feet.
| Step | Description |
|---|
| 1. Wash | Use lukewarm water and mild soap |
| 2. Dry thoroughly | Especially between toes |
| 3. Inspect | Look for any problems |
| 4. Moisturize | Apply lotion to tops and bottoms (NOT between toes) |
| 5. Check shoes | Shake out before putting on |
| Avoid | Reason |
|---|
| Walking barefoot | Risk of unnoticed injury |
| Using heating pads | Can burn without feeling it |
| Soaking feet | Can cause maceration |
| Corn/callus removers | Can damage skin |
| Shaving calluses | Can cause injury |
| Hot water | May burn without sensation |
| Feature | Why It Matters |
|---|
| Wide toe box | Prevents crowding and pressure |
| Depth | Accommodates orthotics and deformities |
| Supportive heel | Stability |
| Cushioned sole | Reduces pressure |
| Adjustable closure | Customizable fit |
| Breathable material | Reduces moisture |
| Tip | Description |
|---|
| Shop later in day | Feet swell throughout the day |
| Measure both feet | Fit to the larger foot |
| Bring your socks | Wear the socks you'll normally use |
| Walk around | Test comfort before buying |
| Check inside | Smooth interior, no seams |
| Indication | Type |
|---|
| Foot deformity | Custom shoes or extra-depth shoes |
| Previous ulcer | Custom-molded shoes or orthotics |
| Charcot foot | Custom CROW (Charcot Restraint Orthopedic Walker) |
| High risk | Prescribed therapeutic footwear |
| Feature | Description |
|---|
| Definition | Break in skin extending through dermis |
| Location | Most commonly on plantar surface (weight-bearing areas) |
| Cause | Repetitive pressure + neuropathy |
| Significance | Major risk factor for amputation |
| Grade | Description |
|---|
| Grade 0 | No open lesion, may have deformity or cellulitis |
| Grade 1 | Superficial ulcer without exposed bone |
| Grade 2 | Deep ulcer, exposed tendon or joint, no bone involvement |
| Grade 3 | Deep ulcer with bone involvement or abscess |
| Grade 4 | Gangrene of toes or forefoot |
| Grade 5 | Extensive gangrene of entire foot |
| Component | Approach |
|---|
| Off-loading | Remove pressure from ulcer (total contact cast, removable boot) |
| Debridement | Remove dead tissue |
| Infection control | Culture-directed antibiotics |
| Moist wound healing | Dressings maintain moist environment |
| Circulation assessment | Evaluate for PAD |
| Glycemic control | Optimize blood glucose |
| Specialist referral | Podiatry, wound care, vascular surgery |
| Method | Indication | Notes |
|---|
| Total contact cast | Plantar ulcers, good circulation | Gold standard, non-removable |
| Removable cast walker | Plantar ulcers | Easier but less effective (patient noncompliance) |
| Healing sandals | Post-op or certain ulcer locations | Limited off-loading |
| Custom shoes/orthotics | Prevention | Redistribute pressure |
| Problem | Consequence |
|---|
| Reduced blood flow | Delayed or no healing |
| Increased infection risk | Poor delivery of antibiotics/immune cells |
| Amputation risk | Higher with PAD |
| Revascularization may be needed | To improve blood flow |
| Sign | Description |
|---|
| Claudication | Pain with walking, relieved by rest |
| Decreased pulses | Weak or absent pedal pulses |
| Cool skin | Temperature difference between feet |
| Hair loss | Decreased hair on feet/toes |
| Shiny skin | Thin, atrophic skin |
| Non-healing wounds | Ulcers that don't improve |
| Test | What It Shows |
|---|
| Ankle-brachial index (ABI) | Compares ankle to arm BP |
| Toe-brachial index (TBI) | Alternative if ABI unreliable |
| Duplex ultrasound | Visualizes blood flow |
| CT/MR angiography | Detailed vascular mapping |
| Sign | Description |
|---|
| Erythema | Redness around wound |
| Edema | Swelling |
| Warmth | Increased temperature |
| Purulence | Pus or drainage |
| Odor | Foul smell |
| Systemic signs | Fever, chills (advanced infection) |
| Class | Description |
|---|
| No infection | Clean wound |
| Mild | < 2 cm cellulitis, no systemic signs |
| Moderate | > 2 cm cellulitis, no systemic signs |
| Severe | Systemic inflammatory response |
| Infection Level | Treatment |
|---|
| Uninfected ulcer | No antibiotics needed |
| Mild | Oral antibiotics targeting staph/strep |
| Moderate | Oral antibiotics, broader coverage |
| Severe | IV antibiotics, hospitalization |
| Strategy | How It Helps |
|---|
| Annual foot exams | Early detection of problems |
| Daily self-exams | Catch problems early |
| Proper footwear | Prevents pressure and injury |
| Glycemic control | Reduces neuropathy progression |
| Smoking cessation | Improves circulation |
| Callus management | Professional debridement |
| Nail care | Professional pedicure or proper self-care |
| Strategy | How It Helps |
|---|
| Continued off-loading | Prevents recurrence |
| Therapeutic footwear | Redistributes pressure |
| Regular professional care | Podiatry follow-up |
| Patient education | Reinforces daily care |
| Situation | Action |
|---|
| New foot pain | Medical evaluation |
| Redness, swelling, warmth | Possible infection—prompt care |
| Fever with foot problem | Urgent care or ED |
| New or worsening ulcer | Prompt podiatry evaluation |
| Black/gray tissue | Possible gangrene—urgent care |
| Foul odor | Infection—prompt care |
| Unable to bear weight | Medical evaluation |
- Foot problems are largely preventable with proper care
- Annual foot exams are essential for everyone with diabetes
- Daily foot inspection catches problems early
- Never walk barefoot—always wear proper footwear
- Ulcers require prompt treatment by a specialist
- Off-loading is critical for ulcer healing
- High-risk patients need more frequent foot care follow-up
All people with diabetes should have a comprehensive foot exam at least annually. High-risk patients (those with neuropathy, PAD, previous ulcers, or foot deformities) need more frequent exams—every 3-6 months or as recommended by their healthcare provider.
People with diabetes may have neuropathy and loss of sensation, meaning they can't feel if a heating pad is too hot. This can lead to serious burns without the person realizing it. Always check water temperature with your hands or elbow, not your feet, and avoid direct heat application.
The first signs may include redness, swelling, or warmth in a specific area, callus formation, or a break in the skin. You might also notice drainage on your socks or an area of localized pain. Because of neuropathy, you may not feel pain even when an ulcer develops, which is why daily visual inspection is essential.
Yes, diabetic foot ulcers can heal with proper treatment. Key factors for healing include off-loading pressure from the area, proper wound care, infection control, adequate blood flow, and good glycemic control. The sooner treatment begins, the better the outcome. Some ulcers require referral to a wound care specialist.
People with diabetes should wear shoes with a wide toe box, good support, cushioned soles, and breathable materials. Those with foot deformities, previous ulcers, or neuropathy may need prescription therapeutic shoes or custom orthotics. Always have shoes professionally fitted and avoid going barefoot.
Sources:
- American Diabetes Association. Standards of Care in Diabetes—2025. Diabetes Care 2025; 48(Suppl 1): S197-S209 (Section 15: Foot Care)
- International Working Group on the Diabetic Foot. Guidelines on the Prevention and Management of Diabetic Foot Disease
This article is for educational purposes only and does not constitute medical advice. Always consult with a qualified healthcare provider before making decisions about your health, treatment, or care. Individual circumstances vary, and what is appropriate for one person may not be appropriate for another.
If you are experiencing a medical emergency, call 911 (or your local emergency number) immediately.