A callus or corn between your toes is almost always what’s known as a soft corn, a whitish-gray, rubbery patch of thickened skin that forms when two toe bones press and rub against each other. It’s one of the most uncomfortable spots to develop toughened skin because the moisture trapped between your toes keeps the area soft and sometimes macerated, making it painful to walk. The good news: most interdigital calluses respond well to a combination of soaking, gentle filing, and reducing the friction that caused them in the first place.
Why Calluses Form Between Toes
The skin between your toes thickens as a protective response to repeated friction and pressure. When two adjacent toe bones (most commonly the fourth and fifth toes) press together inside a shoe, the skin caught in between builds up extra layers. Unlike the hard, waxy corns that develop on top of toes, soft corns stay moist because of sweat and limited airflow in the toe web space. That moisture gives them their characteristic spongy texture and makes them more prone to cracking or becoming infected.
Several structural factors raise the risk. Hammertoes, bunions, bone spurs, and arthritis all change the alignment of the small bones in your foot, creating new pressure points where toes overlap or crowd together. Shoes with a narrow toe box compress the toes further, and shoes that are too loose can be just as problematic because your foot slides around and generates friction. Even naturally wide or bony feet can produce enough bone-on-bone contact to trigger a soft corn.
Softening the Callus First
Trying to file or peel away a callus on dry skin is a recipe for pain and torn tissue. Soaking your feet first makes the thickened layer much easier to remove safely. Fill a basin with warm water (roughly 92°F to 100°F) and add about half a cup of Epsom salt. Soak your feet for around 15 minutes. The crystallized structure of the salt provides mild exfoliation on its own and helps soften the dead skin so it’s ready for the next step. Plain warm, soapy water works fine if you don’t have Epsom salt on hand.
Removing the Thickened Skin
After soaking, gently rub the softened callus with a pumice stone or emery board. Work in light, circular motions. The goal is not to thin the entire callus down in one session. Removing too much at once can expose raw skin and invite infection, especially in the moist environment between your toes. Instead, plan on repeating the soak-and-file routine every few days, gradually reducing the buildup over a week or two.
A few important rules: never use a razor blade, knife, or scissors to cut the callus. “Home surgery” dramatically increases the risk of cutting too deep, bleeding, and infection. Between sessions, dry the space between your toes thoroughly after bathing and apply a gentle moisturizer to the surrounding skin (but not directly into the web space, where excess moisture can make things worse).
Over-the-Counter Medicated Treatments
Salicylic acid is the active ingredient in most drugstore corn removers. It works by dissolving the protein that holds dead skin cells together, allowing you to peel away layers of the callus. For corns and calluses, products come in two main forms: topical solutions (in concentrations of 12% to 27%) and adhesive pads or plasters.
Topical solutions are applied once or twice a day for up to 14 days. Medicated plasters are applied once a day or every other day on the same 14-day timeline. Both are effective, but using them between toes requires extra care. The skin in the toe web is thinner and more sensitive than on the sole of your foot, so the acid can easily irritate healthy tissue surrounding the corn. If you use a medicated pad, trim it so it covers only the callus itself, and watch for redness or stinging on the adjacent skin.
Reducing Friction With Toe Spacers
Removing the callus only solves half the problem. If the underlying friction continues, the corn will come back within weeks. Toe spacers or separators sit between the affected toes and cushion the contact point. They’re made from felt, foam, or silicone gel. Silicone is the most popular option because it’s more durable than foam, easier to clean than felt, and provides a slight stretch that conforms to your toe shape without rubbing or blistering.
You can find low-profile designs thin enough to wear inside shoes, along with bulkier versions intended for rest or recovery time at home. If you’re dealing with a corn between your fourth and fifth toes, a single small spacer is often enough. For more widespread crowding, a full set of separators that fits across all five toes can help redistribute pressure more evenly.
Choosing Shoes That Don’t Make It Worse
Footwear is the single biggest factor in whether your interdigital callus returns. Narrow toe boxes cramp the toes together and recreate exactly the pressure that caused the corn. High heels shift your body weight forward onto the ball of the foot, compressing the toes even more. The combination of a narrow front and an elevated heel is the worst-case scenario for soft corns.
Look for shoes with low heels and a wide toe box that lets your toes spread naturally. A simple test: take the shoe out of the box, set it on the floor next to your bare foot, and compare the shape of the toe area to the actual width of your toes. If your foot is visibly wider than the shoe’s profile, that pair will cause pressure points. Your toes should be able to wiggle freely without pressing into each other or the sides of the shoe.
When Home Treatment Isn’t Enough
If you’ve been soaking, filing, and using spacers for a few weeks without improvement, or if the callus keeps returning quickly, a podiatrist can help. Professional callus removal typically involves debridement: the podiatrist uses a sterilized surgical blade to carefully shave away layers of dead skin, then smooths the area with a pumice stone. The procedure is done in-office and is generally painless because the tissue being removed is dead. If the corn has become infected, the podiatrist may remove the infected tissue and use a cortisone injection to reduce inflammation.
For chronic cases where a bone spur or structural misalignment is driving the friction, outpatient surgery to reshape the underlying bone may be recommended. This is reserved for situations where conservative treatment has repeatedly failed.
Special Caution for People With Diabetes
Diabetes changes the equation significantly. Calluses form more often and build up faster on diabetic feet due to changes in pressure distribution. Left untrimmed, thick calluses can break down and turn into open ulcers, which are notoriously difficult to heal when circulation is impaired. The American Diabetes Association advises against cutting corns or calluses yourself and also warns against using chemical corn removers, which can burn diabetic skin that has reduced sensation. If you have diabetes, have a member of your diabetes care team handle callus removal rather than attempting it at home.