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What are corns and calluses?

Corns and calluses are areas of skin that have thickened in response to repeated friction or pressure. They are the body's normal protective response to mechanical stress, but when the stress is excessive or constant, the thickened skin itself becomes painful — and what was meant to be protection becomes the problem.

A callus is typically broader and shallower, often on the ball of the foot or the heel, and develops in response to chronic pressure (high-heeled shoes, prolonged standing, foot mechanics that load one area heavily). A corn is smaller, deeper, and forms over a bony prominence — typically on top of a hammertoe or between toes where they rub together. Corns have a central core that can press on underlying nerves and cause sharp pain.

At Northwest Extremity Specialists, we treat the immediate symptom (the painful corn or callus) and the underlying cause in the same visit. The trimming itself is quick and painless when done in clinic with sterile instruments. The more important conversation is about why the corn or callus formed in the first place — shoe fit, foot deformity, gait pattern — and what changes will keep it from recurring. For diabetic patients, regular professional callus care is part of preventing more serious complications, and home trimming is strongly discouraged.

See it in motion

What it feels like

Corns and calluses are typically obvious to the patient. Key features:

• Thickened, hardened areas of skin on weight-bearing areas or over bony prominences
• A callus that is broad and shallow, often on the ball of the foot or heel
• A corn that is smaller, deeper, with a central core, often on top of a toe
• Pain with pressure on the area, especially in shoes
• A "pebble in the shoe" sensation under a callus or corn
• Skin that's yellowish or grayish in the affected area
• Soft corns between the toes that look white and macerated

Why it develops

Corns and calluses develop from chronic mechanical stress. Common contributors:

• Tight, narrow, or pointed-toe shoes
• High heels that shift pressure forward onto the ball of the foot
• Hammertoes that create pressure points on top of the toes
• Bunions that cause uneven shoe pressure
• Flat feet or high arches that distribute weight abnormally
• Walking barefoot or in unsupportive shoes for prolonged periods
• Bony prominences from prior injury or surgery
• A long-standing gait pattern that loads certain areas heavily

How we diagnose corns and calluses

Corns and calluses are diagnosed by visual inspection. Your provider will examine the area, look for the underlying cause (foot type, deformity, shoe wear pattern), and check the surrounding skin for any signs of infection or ulceration. X-ray may be taken if a bony prominence is suspected to be the cause. For diabetic patients, the protective sensation of the feet is also assessed. Most patients have both the diagnosis and the treatment done in the same visit.

Non-surgical care

In-office trimming provides immediate relief, but the most important step is fixing the underlying cause. Our typical approach:

• Professional debridement of the corn or callus with sterile instruments (immediate relief)
• Identification and discussion of the underlying mechanical cause
• Footwear recommendations — wider toe box, lower heel, cushioned sole
• Padding (moleskin, gel sleeves, metatarsal pads) to offload the area
• Custom orthotics for cases driven by foot mechanics
• Treatment of any underlying hammertoe or bunion
• For diabetic patients, scheduled routine debridement every 8–12 weeks
• Patient education on safe home care and what to avoid

Surgical care

Surgery is not for the corn or callus itself but for the underlying structural problem causing it. When a hammertoe, bunion, or bony prominence is creating chronic pressure that won't respond to conservative measures, surgical correction of the underlying deformity often resolves the corns and calluses permanently.

• Hammertoe correction (most common surgical reason for chronic dorsal corns)
• Bunion correction for medial calluses
• Resection of a painful bony prominence (exostosectomy)
• Tendon release procedures for selected cases

Recovery depends on the underlying procedure — see our hammertoe and bunion pages for specific timelines. In general, walking in a surgical shoe for 2–6 weeks, return to athletic shoes by 6 weeks, return to normal shoes by 6–10 weeks.

When to see a specialist

• A painful corn or callus that's been bothering you for weeks
• A callus that's changed color, especially in a diabetic patient (could be a wound underneath)
• Recurring corns or calluses in the same spot
• Difficulty walking or wearing regular shoes because of a callus
• Any signs of skin breakdown, drainage, or surrounding redness

Corn and callus care is performed by any of our board-certified podiatrists across all 8 clinics. Dr. Cara Beach at our Cedar Mill and Hoyt offices provides diabetic patients with regularly scheduled professional callus care as part of their prevention program.

Frequently asked questions

• Hammertoe
  The most common underlying cause of dorsal toe corns
• Bunions
  Often cause medial calluses and pressure-related corns
• Diabetic Neuropathy
  Diabetic calluses need professional care, not home trimming
• Metatarsalgia
  Forefoot calluses often accompany ball-of-foot pain