Most serious foot complications do not start with a dramatic injury. They start quietly, on a foot that stopped sending warning signals long ago. For a foot care nurse, the single most valuable skill is recognizing that foot early, before a callus becomes an ulcer and an ulcer becomes something far worse. Good screening is quiet, unglamorous, and it prevents amputations.
A high-risk foot is a foot that has lost its natural defenses against injury, usually because of nerve damage, poor circulation, or both. The person cannot feel a problem developing, cannot heal it well once it starts, or both at once. This guide walks through what to look for during a screening, how widely used frameworks stratify that risk, and, just as importantly, when to stop and refer.
What makes a foot high-risk
Two findings sit at the center of foot risk, and every screening is really looking for them.
The first is loss of protective sensation (LOPS), most often caused by diabetes-related neuropathy. When a foot cannot feel pressure, heat, or a small wound, minor trauma goes unnoticed and unaddressed. The second is peripheral artery disease (PAD), reduced blood flow to the foot, which means that even a small injury struggles to heal. A foot with either one is at-risk. A foot with both, or with a history of ulceration, is where the danger climbs sharply.
Layered on top of these are structural and historical factors: foot deformities, heavy callus, a previous foot ulcer or amputation, and conditions like end-stage renal disease. None of these are things a foot care nurse diagnoses in isolation, but recognizing them is what turns a routine visit into prevention.
The screening: what to check
A useful screening moves through the foot in a consistent order so nothing gets missed.
History first. Ask about diabetes and how long, any previous foot ulcers or amputations, kidney disease, smoking, and symptoms like burning, numbness, or cramping pain in the legs when walking (intermittent claudication). The absence of symptoms does not rule out risk, so history guides but never replaces the physical check.
Circulation. Palpate the pedal pulses, the dorsalis pedis on the top of the foot and the posterior tibial behind the inner ankle. Note skin color, temperature, and hair growth, and check capillary refill. Cool, pale, shiny skin with absent pulses points toward PAD, which warrants further vascular assessment such as an ankle-brachial index.
Sensation. Loss of protective sensation is best checked with a 10-gram monofilament, the standard bedside tool, applied to several points on the sole. A 128 Hz tuning fork adds a vibration check. When neither is on hand, a light touch of your fingertip to the tips of the toes for a second or two is a basic fallback. If the person cannot reliably feel the monofilament, protective sensation is lost.
Skin and structure. Look for calluses and corns (a callus on an insensate foot is a pressure warning, not a cosmetic issue), fissures, dryness, blisters, bleeding under a callus, fungal or thickened nails, ingrown nails, and any deformity such as bunions, hammertoes, or a hot, swollen midfoot that could signal Charcot changes. Check between the toes for maceration, and compare temperature between feet.
Footwear. A quick look inside the shoes for wear patterns, foreign objects, and poor fit often explains a lesion better than the foot alone.
How risk is stratified
Once you know whether LOPS and PAD are present, and what history sits behind them, the foot falls into a widely used risk framework. The International Working Group on the Diabetic Foot (IWGDF) framework is the most common reference, and it ties each risk level to how often the foot should be screened.
| Risk level | Findings | Suggested screening frequency |
|---|---|---|
| Very low (0) | No LOPS and no PAD | Once a year |
| Low (1) | LOPS or PAD | Every 6 to 12 months |
| Moderate (2) | A combination (LOPS with PAD, or either one with a foot deformity) | Every 3 to 6 months |
| High (3) | LOPS or PAD plus a history of foot ulcer, amputation, or end-stage renal disease | Every 1 to 3 months |
The value of this framework for a foot care nurse is practical: it turns a screening into a plan. A high-risk client is not someone you see once, but someone you keep on a tight recurring schedule so a problem is caught while it is still small.
When to refer, and when to refer urgently
Screening is not treatment, and part of doing it well is knowing your limits. Refer to a physician, chiropodist, podiatrist, or wound care team when you find anything beyond your scope.
Refer promptly for any open wound or ulcer, signs of infection (increasing redness, warmth, swelling, discharge, or odor), a foot that is suddenly hot and swollen (possible Charcot), signs of poor circulation such as rest pain or a cold, dusky, or blackened area, or an infected ingrown toenail. When circulation is clearly compromised or infection is spreading, treat it as urgent, not as something to watch until the next visit. If you are unsure which specialist fits the situation, our guide to foot care nurse vs chiropodist vs podiatrist lays out who does what.
And because screening high-risk feet means moving between vulnerable clients, clean instrument reprocessing between every client is part of protecting them. Our guide to infection prevention and instrument care for foot care nurses covers the standards.
Turning screening into prevention
A screening only prevents harm if it is documented and acted on. That means recording your findings consistently, assigning a risk level, and, crucially, scheduling the next visit at the right interval so high-risk clients do not slip through the cracks. Done on paper across a full caseload, that is exactly where prevention quietly fails.
This is where the right tools matter. CompanyOn is practice management software built for care on the go, trusted by 1K+ practices across Canada & US with a 4.8/5 average rating. You can chart each assessment on your phone or tablet during the visit, keep a clear history per client so you can compare a foot over time, and set recurring visits that match each client’s risk level, all protected with HIPAA and PIPEDA aligned security and SSL protection. If foot care is your focus, see how it fits your workflow on our foot care nursing solutions page, and for keeping notes fast and consistent, read our guide to a fast, consistent foot care charting workflow.
Frequently asked questions
What makes a foot high-risk? A high-risk foot has lost its natural defenses, usually through loss of protective sensation (often from diabetes-related neuropathy), reduced circulation (peripheral artery disease), or both. A history of foot ulcer or amputation raises the risk further.
How do foot care nurses screen for a high-risk foot? Take a history, check circulation by palpating pedal pulses and assessing skin, check protective sensation with a 10-gram monofilament, and inspect the skin, nails, deformities, and footwear. The findings determine the risk level and how often the foot should be rechecked.
What is loss of protective sensation? It is the inability to feel pressure, pain, or minor injury in the foot, usually caused by nerve damage. Without it, a small wound can go unnoticed and progress to an ulcer. It is commonly checked with a 10-gram monofilament.
How often should a high-risk foot be screened? Frequency rises with risk. Very low risk feet are typically screened yearly, while high-risk feet (loss of protective sensation or poor circulation plus a history of ulcer, amputation, or end-stage renal disease) may need rechecking every 1 to 3 months.
When should a foot care nurse refer out? Refer for any ulcer, signs of infection, a suddenly hot and swollen foot, signs of poor circulation, or an infected ingrown nail. Treat spreading infection or clearly compromised circulation as urgent.
Catch it early, every time
Recognizing a high-risk foot is only half the job. Acting on it consistently is the other half. Book a demo to see how CompanyOn helps you document assessments, track risk over time, and keep high-risk clients on the right recurring schedule, or start your free 14-day trial and run it on your own caseload.
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This article is general educational information for practitioners, not clinical or diagnostic advice. Always work within your scope of practice and follow your local clinical guidelines.
