It usually starts as a bit of rough skin around the back of the heel. You notice it catching on the bedsheets, so you buy a foot cream and apply it every night. The skin softens a little, but the split is still there. A few weeks later, it is deeper, it stings when you walk, and there is a thin line of blood on your sock.
Cracked heels are one of the most common problems we see in podiatry, and one of the most misunderstood. Most people treat them as dry skin. That is only part of the story. This guide explains what is actually happening in the skin, why moisturiser alone so often fails, what works at home, and when a cracked heel stops being a cosmetic annoyance and becomes something that needs a podiatrist.
What Cracked Heels Actually Are
A cracked heel, or heel fissure, is a split in thickened, hardened skin around the rim of the heel. The callus has lost its normal flexibility, so instead of stretching under the pressure of standing and walking, it gives way.
Underneath your heel bone sits a fat pad that works as a shock absorber. Every time you put weight on the foot, that pad compresses and spreads sideways. Healthy, supple skin moves with it. Hard, dry callus cannot, so when the fat pad pushes outwards, the callus around the heel margin gives way and tears. That is why cracks form at the rim of the heel rather than in the middle, and why they tend to appear where the hard skin is thickest.
This is the part that catches people out. If the callus is what is splitting, then softening the surface with a standard body lotion does not address the problem. The rigid tissue is still there and still under load, so it opens up again every time you take a step. Emollients are not pointless; they are the foundation of treatment, but the thickened skin itself also has to be dealt with, either with the right kind of cream or by having it physically removed.
There is a second reason ordinary moisturisers underperform here. The skin on the sole is the thickest on the body, and the soles and palms are the only areas with no sebaceous glands at all. There is no natural oil production keeping that skin supple, so a cream formulated for arms and legs is working against a very different structure.
What Causes Cracked Heels
The usual culprit is dryness combined with pressure and friction. The common triggers are familiar ones:
- Long periods of standing, particularly on hard flooring at work
- Open-backed shoes, sandals and flip-flops, which let the fat pad spread sideways with nothing to contain it
- Walking barefoot at home
- Carrying extra weight, which increases the pressure through the heel
- Cold weather and dry indoor heating, which pull moisture out of the skin
- Ageing skin, which loses elasticity and repairs its barrier more slowly
Then there are medical causes, and these matter more than most people realise, because a heel can look exactly the same for very different reasons.
Athlete’s foot is the one that gets missed, specifically the moccasin type. Instead of the itchy, blistering rash between the toes that most people picture, it produces fine, dry scaling across the sole and sides of the foot, and it often does not itch at all. People treat it as ordinary dryness for months or years. One useful clue is asymmetry. Fungal scaling frequently affects one foot noticeably more than the other, whereas simple dryness tends to be fairly even on both.
Diabetes contributes in a way that is rarely explained. Autonomic nerve damage can reduce sweating in the feet, so the skin dries out more readily in the first place. Older research summarised in a 2016 review found dry, cracking skin in 22.2% of people with type 1 diabetes compared with 3% of people without diabetes, with a separate study putting it at 44%. Those underlying studies were conducted outside the UK and are now some years old, so treat them as an indication of scale. The pattern is consistent, though: dry, fissure-prone heels are more common in diabetes, and the consequences are more serious.
Eczema and psoriasis, particularly palmoplantar psoriasis, both cause thickened, dry, fissured skin on the soles. Psoriatic fissuring is often well defined and fairly symmetrical between the two feet. An underactive thyroid matters too, because hypothyroidism slows skin metabolism and turns up regularly in people with persistent fissures.
So if your heels are not responding to sensible home care over a few weeks, the assumption that it is “just dry skin” is worth questioning. A podiatrist or chiropodist can tell you which of these you are actually dealing with, and the answer changes the treatment.
Home Treatment That Actually Works
Treat the callus, not just the dryness. Apply a urea-based emollient of 10% to 25% twice daily, file gently on intact skin only, and seal it overnight under cotton socks. If the crack bleeds or has not closed after two weeks, stop self-treating and see a podiatrist.
Get the Urea Strength Right
Urea is the best-evidenced ingredient for cracked heels, and the strength on the tube matters more than the brand. A peer-reviewed dermatology review of urea in skin care sets out three broad bands:
- 2% to 10% works mainly as a humectant, drawing water into the skin. Good for general dryness and daily maintenance.
- 10% to 30% is dual action, moisturising and keratolytic, meaning it also breaks down the bonds holding thickened skin together. This is the practical range for established heel callus.
- Above 30% is primarily keratolytic, and it is sold up to 40% over the counter. It is intended for thick, localised hard skin rather than everyday use, and it is strong enough to thin the healthy skin around it if you overdo it.
In practice, a 10% cream suits general dryness and a 25% product suits thicker, more established callus. If you have diabetes, 20% to 25% is a sensible ceiling for home use rather than reaching for a 40% product.
There is decent trial evidence behind this. In a randomised, double-blind, placebo-controlled trial of a urea, glycerine and petrolatum moisturiser in people with diabetes, only 6.4% of those using the active cream still had an open heel fissure after four weeks, compared with 24.1% on placebo. That trial ran across 19 sites in France and Belgium rather than the UK, and it is one study rather than a large evidence base, but it points clearly in the same direction as UK pharmacy and podiatry guidance.
Salicylic acid, usually around 6%, is a reasonable alternative or an addition. It works differently, loosening the bonds between the dead cells that make up the hard skin, and it is often combined with urea in foot-specific products.
Technique Matters as Much as the Product
- Soak the feet in warm, not hot, water for 10 to 20 minutes to soften the skin.
- File gently with a pumice stone or foot file, in one direction, taking off thin layers only. Stop well before you reach pink, tender skin.
- Never file broken, bleeding or infected skin.
- Apply the emollient to slightly damp skin straight after soaking or bathing.
- Overnight, apply a thick layer and put on clean cotton socks. The occlusion helps the product penetrate rather than rubbing off on the carpet.
Two Popular Approaches to Be Careful With
Blade-type callus shavers and credo knives.
Do not use them at home. Diabetes UK’s foot care guidance says plainly not to use blades on corns or tough skin because they can damage it, and NHS podiatry services give the same advice more broadly. What makes a blade safe in clinic is the judgement behind it rather than the tool itself. A podiatrist has years of training telling them exactly how much tissue to take and when to stop. Without that, it is very easy to remove too much and turn a fissure into an open wound, which carries the same infection risk as the crack you were trying to fix, only deeper.
Chemical foot peel masks.
There is no clinical trial evidence for branded foot peel products in treating heel fissures. Plenty of people find them satisfying for surface dryness, and that is a fair reason to use one on healthy skin. But they act on surface dead cells, not the rigid callus at the rim that is causing the crack, so they do not fix an established fissure. They should not be used on open or bleeding cracks, and not at all if you have diabetes, dermatitis or circulation problems, as the acid concentrations used are considerably higher than in facial peels.
When Home Care Is Not Enough
Once callus is established around the heel rim, the hard skin itself is what stops the crack healing. It holds the edges apart and splits open again with every step. At that point, more moisturiser is not the answer. The tissue has to come off.
That is what professional treatment does. A podiatrist uses a sterile scalpel to pare away the thickened, inflexible skin around and within the fissure, using trained visual and tactile judgement, which allows the edges of the crack to come together and heal properly. For deeper fissures, a podiatrist may seal the crack with a medical tissue adhesive to relieve pain and protect the wound while it closes. Treatment does not stop at the blade, though. A proper appointment should also cover why the callus is forming, which usually means looking at footwear, walking pattern and pressure distribution, and setting up an emollient routine that stops it rebuilding.
At Provide Wellbeing, our HCPC-registered podiatrists provide corn and callus removal alongside routine podiatry from our clinics in Essex. Most people find it quicker than they expect, and the foot usually feels better walking out. You can see the full breakdown of podiatry appointment costs before you book, and no referral is needed.
Frequently Asked Questions
What Vitamin Deficiency Causes Cracked Heels?
Shortfalls in nutrients such as zinc or iron can slow skin healing generally, and you will see this claim made a lot online. Be aware that it is repeated mostly on supplement and clinic marketing sites, and there is no good clinical evidence linking any specific deficiency to heel fissures. In practice, callus mechanics, moisture loss and pressure explain the overwhelming majority of cracked heels. Fix those first.
Can Vaseline Fix Cracked Heels?
Vaseline is an occlusive, not a treatment. It seals moisture in, which makes it genuinely useful as an overnight layer applied on top of a proper urea-based emollient. What it cannot do is soften or remove the hard callus holding the crack open, because it has no keratolytic action at all. So it manages an established fissure rather than fixing it.
What Percentage of Urea Cream Should I Use?
Around 10% for general dryness and daily maintenance, and up to 25% for thicker, established callus. Products above 30% are keratolytic and better suited to short courses on thick, hard skin than everyday use. If you have diabetes, stay at or below 25%. There is no single right answer, which is why online advice is so contradictory, and it is one of the things a podiatrist can settle in five minutes by looking at your feet.
Are Foot Peel Masks Safe for Cracked Heels?
For healthy feet with surface dryness, many people find them effective, and they are broadly low risk. They are not a treatment for cracked heels, because they lift surface dead skin rather than the deeper rigid callus that causes the split. Do not use one on an open or bleeding fissure, and avoid them entirely if you have diabetes, eczema or circulation problems.
Is It Safe to Shave Hard Skin Off at Home With a Blade?
No. Even people who are confident with blades, including beauty professionals, generally advise against it for anyone untrained. Two things go wrong: it is very hard to judge how much hard skin you can safely take, and a blade can slice into healthy tissue in an instant. Either outcome leaves you with an open wound on a weight-bearing part of the foot. This is exactly the job a podiatrist does safely in clinic.
Could My Cracked Heels Be Something Else, Like a Fungal Infection or Psoriasis?
Quite possibly. Moccasin-type athlete’s foot, psoriasis and eczema can all produce dry, thickened, cracked heel skin that looks identical to ordinary dryness, and each needs different treatment. An antifungal will not help psoriasis, and a steroid cream will make a fungal infection worse. If your heels are not improving with several weeks of sensible emollient use and gentle filing, that is the point to have them properly assessed rather than trying the next product.
