A rub from a new boot. A nick while trimming a nail. A dry crack at the heel that finally splits open. For most people these barely register. When you have diabetes, the same small break in the skin is worth handling with some deliberate care, and the first day counts for more than people expect.

None of this calls for panic. It calls for a short routine you can follow the moment you spot something, so that a minor wound stays minor.

Why the first day carries extra weight

Two things change the picture. Years of raised blood glucose can dull sensation in the feet, so the sting that would normally make you stop and look may be faint or missing altogether. Blood flow to the foot can also be reduced, and tissue that receives less blood tends to repair more slowly and has less margin if bacteria get in.

The practical consequence is that pain is an unreliable alarm here, which makes waiting several days to see what happens a poor strategy. If dulled or altered sensation is part of your picture, our guide to nerve symptoms in the feet and what helps covers that side of it.

What to do in the first hour

1. Wash your hands. Rinse the area with clean lukewarm water and a mild soap, then pat it dry with a clean towel, including between the toes.

2. Look at it properly, in good light. Note the size, whether anything is still lodged in it, and whether the skin is broken or still intact. If you cannot comfortably see the sole of your own foot, use a mirror on the floor or ask someone to look for you. The same practical problem comes up when checking a parent's feet.

3. Cover it with a clean, non-stick dressing. Clean, dry and covered is the goal. An uncovered wound collects sock lint and grit over the course of a day.

4. Record what you saw. A dated photo taken in the same light each day is the easiest way to tell later whether it is shrinking or not.

5. Tell a professional the same day. Call your foot care provider or your diabetes care team, say where the wound is, how it happened and what you can see, and let them decide how soon you need to be looked at.

That last step is the one people skip, usually because the wound looks trivial. Often it is. The call is what makes sure the one that is not trivial gets caught while it is still small.

What to leave alone

• Do not drain or peel a blister. The intact roof over it is a sterile dressing you already have.

• Keep medicated corn plasters, wart treatments and strong antiseptics such as hydrogen peroxide or iodine tinctures away from an open wound on the foot. Several of them are acidic or harsh enough to damage the healthy skin at the edges.

• Put away razor blades, graters and sharp nail tools. Our piece on safe callus and corn care with diabetes sets out why trimming hard skin yourself carries real risk when sensation is reduced.

• Avoid long soaks. Extended soaking softens the skin and leaves wound edges fragile.

• Stop wearing whatever shoe caused it, at least until the skin has closed.

Watching it at home, and the point where that stops being enough

A shallow wound that is getting smaller, with edges that look drier and tighter day by day, is usually heading the right way. Check it once a day at roughly the same time, and compare it against your photo rather than against your memory of yesterday.

Three findings mean the plan changes. The wound is the same size or bigger after three or four days. Any discharge appears. The skin around it turns warm, puffy or discoloured. Each of those is a reason to be seen rather than to keep waiting and watching.

Signs that should not wait for an appointment

• Redness spreading outward from the wound, or a red streak travelling up the foot or leg.

• Pus, a bad smell, or fluid soaking through the dressing.

• Fever, chills, feeling generally unwell, or blood glucose readings that climb for no clear reason.

• Skin at or around the wound turning grey, dark or black.

• A wound deep enough that you can see tissue below the skin, or one caused by standing on a nail, a staple or glass.

• A foot that has newly become cold, pale or bluish.

Any of these needs urgent medical assessment the same day, through your physician, an urgent care clinic or an emergency department. That is a different route from a routine foot care booking, and it is the right one to take.

Take the load off the foot

Pressure is the main reason foot wounds stay open. A wound under the ball of the foot or on the heel is being compressed with every step you take, which is also why one on the top of the foot often behaves better than one on the sole.

Until it has been assessed, wear a roomy shoe that does not press on it, keep the dressing dry, and cut your walking volume for a few days rather than pushing through. When you build activity back up, stage it, the way we describe in walking and daily activity with diabetes. If the wound started with a new pair of shoes or winter boots, our guide to breaking those in has the wear-time progression to use when you go back to them.

What a chiropody appointment adds

An assessment usually covers cleaning the wound, removing dead tissue or overlying hard skin where that is appropriate, dressing it in something suited to how wet or dry it is, and checking circulation and sensation so the healing timeline you are given is a realistic one. Offloading is often the part that changes how quickly things move: padding, a dressing shaped to redistribute pressure, a change of footwear, or a referral onward when a wound needs care beyond what a foot clinic provides. Where infection is suspected, that becomes a medical matter and your physician is brought in.

For the wider list of findings on a foot affected by diabetes that deserve attention, see our guide to diabetic foot warning signs. If your diagnosis is recent, the first-year guide puts this routine in context with everything else you are being asked to take on at once.

Frequently Asked Questions

Is a blister really worth a phone call?

With diabetes in the picture, yes. The call may well end with advice to keep it covered and send a photo in a few days, which is a good outcome. What it avoids is the common sequence where a blister gets dismissed, stays under pressure in the same shoe, and opens into something considerably harder to treat.

How long should a small wound take to close?

A shallow, clean one often closes within one to three weeks, though that varies with circulation, glucose control, where on the foot it sits and how much pressure it takes each day. Direction of travel is more useful than a deadline. Steady week-to-week improvement is reassuring; no change after several days is not.

Does it mean anything that it does not hurt at all?

It means you cannot use pain to judge it. A painless wound is not a milder wound, and reduced sensation is itself a reason to have the foot assessed rather than a reason to relax about it.

Which dressing should I be using?

For the first day, a clean non-stick dressing that keeps the wound covered and dry is enough. After that the right choice depends on the wound itself, so it is worth having that decided at an appointment instead of working through whatever is in the cupboard.

My glucose readings have been high since this started. Are the two connected?

They can be. Infection and the body's stress response to a wound can both push readings up, and higher readings in turn make healing harder. Numbers climbing alongside a foot wound are worth raising promptly with whoever manages your diabetes.

Found a break in the skin and not sure whether it needs looking at? Book a diabetic foot care appointment at Donwood Foot Clinic, and bring the shoes you were wearing when it happened.