What Are Corns and Calluses?

Corns and calluses are your skin’s natural defense mechanism against repeated friction and pressure. When an area of skin experiences chronic rubbing or compression, it responds by building up layers of dead skin cells to protect the underlying tissue. While they share a similar cause, corns and calluses differ in their location, appearance, and symptoms.

Calluses are broad, flat areas of thickened skin that typically develop on the bottom of the foot — under the ball of the foot, the heel, and along the sides of the big toe. They rarely cause pain and serve a protective function. However, excessively thick calluses can crack (fissure), especially on the heels, creating painful openings that risk infection.

Corns are smaller, more concentrated areas of thickened skin with a hard central core that presses into deeper tissue layers. Hard corns form on the tops and sides of toes — usually where they rub against shoes. Soft corns develop between toes where moisture keeps the thickened skin soft and macerated. Corns are often painful because their cone-shaped core acts like a pebble pressing into the sensitive tissue beneath.

What Causes Corns and Calluses?

The root cause is always repeated friction or pressure against the skin. Several factors create the conditions for this to occur. Poorly fitting shoes are the primary culprit — shoes that are too tight compress the toes and sides of the foot, while shoes that are too loose allow the foot to slide and rub. High heels shift body weight forward onto the ball of the foot, creating excessive pressure that leads to callus formation.

Foot deformities significantly increase your risk. Bunions create bony prominences that rub against shoes and alter weight distribution. Hammertoes cause the top of the bent toe to press against the shoe, creating corns. Flat feet and high arches both cause abnormal pressure distribution that leads to callus formation in specific patterns. Bone spurs and other structural abnormalities create localized pressure points.

Biomechanical issues play a role too. Abnormal gait patterns concentrate pressure on specific areas of the foot with every step. Over thousands of daily steps, these areas develop protective calluses. Custom orthotics can redistribute this pressure and are often part of the long-term solution for recurring corns and calluses.

Safe Home Treatment for Corns and Calluses

For otherwise healthy individuals, mild corns and calluses can often be managed at home with proper care. Start by soaking your feet in warm water for 10 to 15 minutes to soften the thickened skin. Then gently reduce the buildup using a pumice stone or foot file, rubbing in one direction with light pressure. Never try to cut or shave calluses with a razor or sharp instrument — this risks cutting too deeply and causing a wound or infection.

After filing, apply a rich moisturizing cream (look for ingredients like urea, salicylic acid, or lactic acid) to keep the skin soft and prevent further buildup. Non-medicated donut-shaped pads can relieve pressure on corns by surrounding the corn and lifting the shoe’s pressure off the sensitive area. Switching to well-fitting shoes with a roomy toe box addresses the underlying cause and prevents recurrence.

When to See a Podiatrist

Professional treatment is recommended when home care isn’t adequate or when underlying conditions make self-treatment risky. A podiatrist can safely debride (trim) thick calluses and enucleate (remove the core of) corns using sterile instruments, providing immediate pain relief. This is a painless procedure that takes just minutes.

For recurring corns and calluses, Dr. Biernacki identifies and addresses the underlying cause — whether that’s a biomechanical issue correctable with custom orthotics, a structural deformity like a bunion or hammertoe that may benefit from surgical correction, or simply a footwear issue. Treating the symptom without addressing the cause means the corn or callus will keep coming back.

A medical pedicure at Balance Foot & Ankle provides professional callus reduction along with comprehensive foot care in a sterile medical setting — ideal for patients who want expert foot care beyond what’s available at a nail salon.

Frequently Asked Questions

Are corns and calluses the same thing?

No. While both are caused by friction and pressure, calluses are broad, flat patches of thickened skin on the bottom of the foot and are usually painless. Corns are smaller, have a hard central core, form on or between toes, and are often painful. Soft corns between the toes have a different texture due to moisture but share the same underlying cause.

Can I remove a corn myself?

Mild corns can be managed with soaking, gentle filing, and protective padding. However, never attempt to cut a corn with a razor or knife — this can cause serious injury and infection. Over-the-counter medicated corn pads containing salicylic acid should be used with caution, as the acid doesn’t distinguish between corn tissue and healthy skin. If you have diabetes, circulation problems, or neuropathy, always see a podiatrist rather than self-treating.

Why do my calluses keep coming back?

Calluses recur because the friction or pressure causing them hasn’t been eliminated. This could be due to footwear that doesn’t fit properly, a biomechanical issue like flat feet or overpronation, or a structural deformity like a bunion or hammertoe. Addressing the root cause — through better shoes, custom orthotics, or corrective surgery in severe cases — is the key to preventing recurrence.

Are cracked heels dangerous?

Deep heel fissures can break through to the dermis, creating painful openings that are vulnerable to bacterial infection. For most people, consistent moisturizing and regular callus reduction prevent cracking. For diabetic patients, cracked heels are a serious concern because reduced sensation means they may not notice deepening cracks until infection develops. Professional care is essential for anyone with diabetes or poor circulation.

Sources

• American Podiatric Medical Association — Corns and Calluses
• American Academy of Dermatology — Corns and Calluses Treatment
• American Diabetes Association — Foot Care Guidelines

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• Medical Pedicure by Podiatrists
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• Bunion Prevention Guide
• Diabetic Foot Care
• Senior Toenail Care Service
• What to Expect at Your First Podiatrist Visit