Corns and Calluses: Complete Guide to Prevention, Treatment, and When to See a Doctor

Medically reviewed by Dr. Tom Biernacki, DPM — Board-Certified Podiatric Surgeon — Balance Foot & Ankle, Howell & Bloomfield Hills, MI. Last updated April 2026.

What Are Corns and Calluses?

Corns and calluses are areas of thickened, hardened skin that form in response to repeated friction or pressure. They are the skin’s protective response — building up a thicker barrier to protect against the irritation that’s causing them. While they serve a protective function, they can become painful and problematic, particularly in people with diabetes, poor circulation, or neuropathy.

At Balance Foot & Ankle in Howell and Bloomfield Township, we treat corns and calluses regularly — typically removing them in minutes during an office visit while also addressing the underlying causes that allowed them to form.

Corns vs. Calluses: The Difference

Calluses are broad areas of thickened skin, typically on weight-bearing areas of the sole — under the metatarsal heads, on the heel, or on the lateral border of the foot. They are diffuse, relatively uniform in thickness, and usually not particularly painful unless very thick or cracked.

Corns are smaller, concentrated areas of thickened skin with a hard central core (nucleus) that points inward, pressing on underlying nerves and causing sharp, localized pain. Hard corns (heloma durum) typically develop on the toes or outer edge of the foot where bones press against shoe material. Soft corns (heloma molle) develop between the toes, where the skin remains soft from moisture — they have a rubbery texture and can become macerated and infected.

An additional type — nucleated calluses or intractable plantar keratosis (IPK) — involves a discrete, deeply nucleated callus under a metatarsal head that causes significant point tenderness similar to a corn.

What Causes Them?

All corns and calluses are caused by mechanical factors: friction, pressure, and shear forces applied repeatedly to the same skin area. Improperly fitting shoes — too tight, too narrow, or with seams over bony prominences — are the most common cause. Foot deformities (bunions, hammertoes, flat feet) create abnormal pressure points on the skin. Walking barefoot on hard surfaces creates calluses on weight-bearing areas. Bony prominences create pressure hotspots regardless of shoe fit.

Safe Home Care

Soaking the affected area in warm water for 10–15 minutes softens the skin. Gentle pumice stone or emery board use after soaking can reduce callus thickness. Over-the-counter moisturizing creams (particularly those containing urea or salicylic acid) help soften thickened skin with regular use.

OTC corn pads containing salicylic acid are effective for some corns but carry risks — they don’t distinguish between corn and healthy skin and can cause chemical burns, particularly in diabetic or vascular patients. These should be used cautiously or avoided in high-risk patients.

What Not to Do

Never use razor blades, scissors, or other sharp instruments to cut corns or calluses. Infection risk is significant, particularly in diabetic patients where a small self-inflicted wound can escalate into a serious infection. This is precisely the kind of “bathroom surgery” that causes hospital admissions in diabetic patients.

Professional Treatment

Our podiatrists perform corn and callus debridement with a sterile blade, removing the thickened skin down to healthy tissue in a painless, precise procedure. We also address the underlying cause: fitting advice for shoes, toe padding or offloading devices for corns on bony prominences, metatarsal pads for plantar calluses, and orthotics for biomechanical contributors. Without addressing the cause, corns and calluses inevitably recur.

If you have painful corns or calluses, or if you’re a diabetic patient with any foot skin thickening, contact Balance Foot & Ankle for safe, effective professional care.

Foot or Ankle Pain? We Can Help.

Balance Foot & Ankle — Howell & Bloomfield Township, MI

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Struggling with Corns or Calluses That Keep Coming Back?

Corns and calluses are your body signaling abnormal pressure on the foot. A podiatrist can identify the biomechanical cause — whether its a hammertoe, bunion, or ill-fitting shoes — and provide lasting solutions including professional debridement and custom orthotics.

Get Professional Corn and Callus Treatment | Book Your Appointment | Call (810) 206-1402

Clinical References

1. Freeman DB. Corns and calluses resulting from mechanical hyperkeratosis. American Family Physician. 2002;65(11):2277-2280.
2. Singh D, et al. Fortnightly review: plantar fasciitis and corns. BMJ. 1997;315(7111):172-175.
3. Grouios G. Corns and calluses in athletes feet: a cause for concern. The Foot. 2004;14(4):175-184.