80% of Amputations Begin With a Small Wound: A Diabetic Foot Protection Guide

Many people with diabetes share a dangerous misconception: a small break in the skin, a callus, numbness — if it does not hurt, it does not need treatment. Yet clinical data confirm that more than 80% of diabetes-related amputations begin as tiny, easily overlooked wounds. Diabetic foot is hidden in onset, slow to heal and highly disabling, making it the leading chronic complication threatening quality of life.

To help people with diabetes and their families protect their feet scientifically and avoid these risks, Episode 35 of JianJia Rehabilitation's “Experts Talk Rehabilitation” series invited Dr. Li Gongchi, associate chief physician at Union Hospital Affiliated to Tongji Medical College of Huazhong University of Science and Technology, to explain in plain language the full set of essentials: diabetic foot risks, triggers, home self-checks, daily care and structured rehabilitation. If you missed the livestream, be sure to save this recap.

Recognizing the Risk: Diabetic Foot Is Far More Than a “Bad Foot”

Diabetic foot is a combined neuropathic and vascular disorder driven by high blood glucose. In its early stage it is almost painless, yet it carries extremely high risks — and it is the hazard most easily overlooked:

• Extremely high incidence: one in every three to four people with diabetes will develop diabetic foot at some point in their life;
• Major disability risk: over 30% of people with diabetes develop foot ulcers, and nearly 20% of ulcer patients ultimately face amputation;
• Highly hidden early stage: at first there may be only numbness, cold feet and dulled sensation — no skin breakdown, no pain — so it is very easy to miss;
• Serious systemic harm: a foot infection can trigger sepsis, and vascular disease in the feet is also an important warning sign of heart attack and stroke.

Broadly speaking, the disease unfolds in two key stages — and the earlier the intervention, the better the chance of keeping both feet:

• High-risk warning period (the best window for intervention): the skin is intact, with only numbness, tingling, cold feet and fatigue when walking;
• Ulcer stage: the skin has broken down with recurrent ulceration and infection, requiring professional treatment combined with rehabilitation intervention to prevent progression to amputation.

Finding the Root Causes: Two Core Culprits and Three Overlooked Daily Hazards

Why does a small wound lead to a festering foot in people with diabetes, and why do wounds refuse to heal? The core lies in the dual damage caused by high blood glucose, compounded by misconceptions in daily care that trigger and aggravate the disease.

1. Two core causes

Neuropathy — the alarm system fails: high blood glucose damages the nerves of the feet, so they lose the sensation of pain and temperature. Scrapes, burns and pressure go entirely unnoticed, and injury proceeds silently without the person knowing. Night-time foot numbness, a crawling sensation and toe deformities often appear alongside.

Vasculopathy — the repair system fails: high blood glucose hardens, narrows and blocks the blood vessels of the lower limbs, leaving the feet short of blood supply and nutrition. Both feet feel cold, walking brings calf pain (intermittent claudication), and even a tiny wound cannot heal and easily turns ulcerous and gangrenous.

In summary: neuropathy that “cannot feel pain” plus vasculopathy that “cannot heal” are the fundamental reasons diabetic foot keeps recurring.

2. Three easily overlooked daily hazards

Foot deformity and keratosis: calluses, corns, hallux valgus and claw toes create uneven pressure on the feet; long-term friction produces painless damage beneath the skin, and trimming these yourself can easily break the skin and cause infection.

Superficial fungal infections: athlete's foot, ingrown nails and paronychia are the main entry points for infection, and a high-glucose environment accelerates bacterial growth — even minor peeling or redness can progress to serious ulcers and osteomyelitis.

Improper footwear and accidental injury: shoes that are too tight or too hard, sock cuffs that constrict, walking barefoot at home, or grit left inside a shoe all cause painless injuries — the main man-made cause of everyday foot damage.

Home Practice: Self-Checks and Scientific Care to Hold the First Line of Defense

Diabetic foot is preventable and controllable. Daily self-checks and home care can avert more than 90% of foot risks — and every method below is something ordinary people can put into practice straight away.

1. A five-minute daily self-check (look and touch)

Look at the feet: in good light, examine both feet — check the skin for dry cracks, blisters, redness and breaks; check whether the nails have thickened, become ingrown or discoloured; check the toes and sole for deformity, using a mirror for the blind spots under the foot.

Touch temperature and pulses: compare the temperature of the two feet — if one side is markedly colder, be alert to inadequate blood supply; gently feel the pulses on the dorsum of the foot and the inner ankle; a weak or absent pulse calls for immediate medical screening of the blood vessels.

2. Annual professional screening

People with diabetes who have no symptoms should have a dedicated foot examination once a year to detect hidden disease early: the 10-gram nylon monofilament touch test, the 128 Hz tuning-fork vibration test, and the ankle-brachial index (ABI) vascular assessment.

3. Ten golden rules of home foot care

1. Wash feet in warm water: water no hotter than 37°C, for no more than 10 minutes, then dry thoroughly between the toes;
2. Moisturise the feet: apply cream to the heels and soles but avoid the spaces between the toes, so dampness does not breed fungus;
3. Trim nails properly: cut straight across and not too short; snip hangnails with scissors and never tear them by hand;
4. Wear shoes at all times: never go barefoot at home or outdoors, to avoid cuts, burns and punctures;
5. No self-treatment: do not trim calluses, corns or ingrown nails yourself or apply random remedies — seek professional care;
6. Check shoes before wearing: clear out grit and loose threads each time, to prevent injuries to the sole;
7. Choose footwear wisely: wear shoes with a wide toe box, soft soles and breathable material, paired with loose, light-coloured cotton socks;
8. Exercise in moderation: do daily ankle pumps, heel raises and leg swings to promote circulation in the lower limbs;
9. Keep habits under control: eat a balanced diet, keep blood pressure, blood lipids and blood glucose stable, and quit smoking resolutely (nicotine directly cuts off the blood supply to the feet);
10. Seek care promptly: clean and dress even the smallest wound properly, and see a doctor at once if there is redness, swelling or oozing, or if a wound refuses to heal.

Structured Rehabilitation Across the Full Care Cycle

The livestream placed special emphasis on one point: surgery resolves the acute crisis; rehabilitation determines long-term quality of life. Diabetic foot does not end when the wound closes — structured rehabilitation throughout the whole course of care is the key to reducing recurrence and preserving the ability to walk.

• Precise assessment: testing nerves, vessels, muscle strength and joint range of motion to tailor a personalised rehabilitation plan;
• Exercise rehabilitation: training the joints, muscle strength and balance to prevent joint contractures and lower-limb thrombosis;
• Physical therapy: electrical stimulation and red/blue light to improve blood supply, control infection and speed wound healing;
• Hyperbaric oxygen therapy: specifically improving oxygen starvation in the wound to tackle chronic, hard-to-heal ulcers of every kind;
• Rehabilitation engineering: custom pressure-relieving insoles and walking boots to redistribute pressure on the foot and put a stop to ulcer recurrence;
• Daily-living training: coaching patients to put on protective braces and use walking aids independently, restoring the ability to manage everyday life.

The most frightening thing about diabetic foot is not the disease itself, but ignoring small hidden risks, falling into care misconceptions, and refusing early intervention. Stick to early screening, early detection, early intervention and structured rehabilitation, and the risk of amputation can be effectively avoided and foot health protected.