Two people can manage their diabetes equally well and still have very different feet. Part of what separates them is plumbing: how much blood is still reaching the toes, and how much repair capacity that leaves behind. A circulation check is how that question gets answered, and it usually takes under ten minutes.

Most people with diabetes have had their sensation tested at some point, often with a thin filament pressed against the sole of the foot. Far fewer have had the blood flow side explained in plain language. The two findings lead to different advice, so it helps to know which one you were actually given.

Blood flow and nerve supply answer different questions

Nerve function decides what you feel. Blood flow decides what your foot can repair. Diabetes can affect either one, both, or neither, and the combinations matter.

Normal sensation with reduced flow means you will feel an injury, but it may be slow to close. Reduced sensation with good flow means you might not notice a rub for days, though once it is found it tends to heal at a reasonable pace. Both reduced together is the combination that gets watched most closely. If the thing you mainly notice is burning, tingling or shooting pain, that is the nerve side of the picture, and what actually helps with diabetic nerve pain is a different conversation from this one.

What you can notice at home

None of the following is a diagnosis. They are reasons to raise something at an appointment.

• One foot that is reliably cooler than the other, judged by hand on bare skin rather than through a sock.

• Colour that shifts with position: pale when the leg is up on the couch, dusky red or purple once it hangs down.

• Skin over the toes that has gone shiny and lost its hair, with toenails growing more slowly than they used to.

• Calf or thigh ache that arrives after a fairly predictable walking distance and settles within a few minutes of standing still.

That last one is the most useful item on the list and the most commonly waved away. People file it under getting older or being out of shape. Say it out loud anyway. A symptom that reproduces at roughly the same distance every time is a strong clue, and it is the kind of detail that changes what gets checked.

What is worth very little is feeling for your own pulses. They sit in two specific spots, they are easy to miss in a thicker foot or a cold room, and it is entirely possible to feel your own fingertip pulsing and draw the wrong conclusion in either direction.

What gets measured at the clinic

A vascular check on the feet is layered. Each step narrows down what the next one has to do.

• Pulses by hand. Two per foot, one on top and one behind the inner ankle bone. Easy to find on both sides is reassuring.

• A handheld doppler. When a pulse is hard to feel, the device produces an audible signal, and the character of that sound carries more information than a simple yes or no.

• Ankle and arm pressures. Comparing the two gives a ratio. Long standing diabetes can stiffen vessel walls and push that ratio up misleadingly, so toe pressures are sometimes used instead.

• Skin signs. Where the temperature changes as you move up the leg, how fast colour returns after a toe pad is pressed, swelling, and the condition of the skin and nails.

Sensation testing usually happens in the same visit, with a filament and a tuning fork. It sits alongside the circulation work rather than standing in for it. For the wider question of which foot findings matter when you have diabetes and which ones need action now, our guide to diabetic foot warning signs covers the full set.

What a reduced result changes

This is the part that tends to get skipped, and it is the only reason the measurement is worth taking. Reduced flow does not change your feet overnight. It changes the thresholds you work to.

Small skin damage stops being small. A nick, a rub or a blister becomes time sensitive instead of something to keep half an eye on, so the steps for a cut or blister on a foot affected by diabetes are worth reading before you need them rather than during.

Footwear tolerances tighten. New shoes and winter boots get introduced over a longer stretch, with a look at the skin between wears, which is the approach set out in breaking in new shoes and boots with diabetes.

Hard skin becomes someone else's job. Files, blades and medicated plasters come off the home list for the reasons described in safe callus and corn care with diabetes.

Walking carries on. Reduced flow is rarely a reason to sit down, and activity is generally part of the plan rather than a threat to it, although increases are staged rather than jumped into. Walking with diabetes covers how that gets paced.

Some results belong with your physician. Clearly reduced readings, or symptoms that do not match the numbers, can prompt a referral for fuller vascular assessment. A chiropodist screens, interprets and flags. Investigating and treating the arteries themselves is vascular medicine.

What a normal result does not buy you

A clean circulation check describes today. It is not a pass to stop looking at your feet, and it does not outrank a wound that is behaving badly in front of you. Blood flow can change over years, usually without announcing itself. If your diagnosis is recent and the routine is still coming together, the first year after a diabetes diagnosis is where those habits get built.

When this should not wait for a routine visit

A few presentations need same-day medical assessment through your physician, an urgent care clinic or an emergency department, rather than an appointment next week:

• A foot or toe that becomes suddenly cold, pale or mottled and painful.

• Pain in the foot or toes at rest, particularly at night, that eases when you hang the leg out of bed.

• A wound that is not getting smaller after a week or two, or that smells or leaks.

• Redness spreading up the foot, or feeling unwell and feverish alongside any break in the skin.

Healing times vary a great deal between people, so the number of days matters less than the direction of travel. Something that is steadily improving is usually fine to keep monitoring. Something static or worsening is a reason to be seen.

Getting a straight answer at your appointment

Ask for the result in words you can repeat later. "Both pulses easy to find, nothing changes" or "flow is reduced on the left, so we treat small injuries as urgent" will stay with you longer than a number you half remember. Mention any walking related leg ache, bring the shoes you actually wear most days, and say so if anyone has told you before that a pulse was hard to find. If you are unsure what to book, which chiropody appointment you need sorts out the options.

Frequently Asked Questions

Can I work out my own circulation by pressing on my ankle?

Not with any confidence. Finding a foot pulse takes practice and the right spot, and a cool room, swelling or a thicker foot all make it harder. People talk themselves into a pulse that is their own fingertip, and others miss one that is perfectly present. Treat colour, temperature difference between feet and walking related ache as your home observations, and leave the pulses to someone checking them regularly.

My feet are always cold. Is that enough reason to get checked?

On its own it is a weak signal. Both feet feeling cold in a cool house is extremely common and often has nothing to do with arteries. What carries more weight is a difference between the two feet, a change from how your feet used to be, or cold skin arriving together with colour changes or slow healing. Worth mentioning at your next visit, not worth losing sleep over.

I can feel a pulse, so why do my toes still look purple when I stand up?

Report the colour. A pulse at the ankle says the large vessel is doing its job, but it cannot speak for the small vessels out at the toes, and diabetes can affect those separately. Colour that changes with position is a finding in its own right, and it is one of the reasons the examination looks at skin and refill as well as pulses.

Does a good reading mean I can ease off the daily foot checks?

No, and the two are not really connected. Daily checks exist to catch injuries early, whatever your blood flow is doing. A reassuring circulation result mainly tells you that a small injury is likely to have a reasonable chance of closing. It does not tell you an injury has not happened.

If the flow looks reduced, am I going to be sent somewhere else?

Sometimes, and that is a normal outcome rather than a bad one. Mild changes are usually managed by adjusting footwear, skin and nail care and how quickly minor problems get dealt with. Clearer reductions, rest pain, or a wound that is not progressing are reasons to loop in your physician, who may arrange further vascular assessment. Routine foot care generally continues alongside that.

Book a diabetic foot assessment

If nobody has explained what your foot circulation currently looks like, that is a fair thing to ask about. A diabetic foot assessment at Donwood Foot Clinic in North York covers both the blood flow and the sensation side, and you leave knowing which findings apply to you. Book an appointment online.