How should corns be treated?

Calluses and corns—often colloquially referred to as “plantar warts” in non-medical settings (though they are not warts at all)—are localized areas of thickened, hyperkeratotic skin that develop in response to repeated mechanical pressure or friction. True corns (clavi) are typically smaller, more circumscribed, and often have a central, conical core of hardened keratin that can press into underlying dermal tissue, causing pain—especially when weight-bearing. They most commonly occur over bony prominences on the toes (e.g., dorsal or interdigital surfaces) or soles.

Treatment begins with identifying and eliminating the causative biomechanical stressor. This includes wearing properly fitted footwear with adequate toe box width and cushioning, using padded shoe inserts or orthotics to redistribute pressure, and avoiding high heels or tight shoes. Over-the-counter salicylic acid preparations (12–40% concentration) in the form of plasters, gels, or solutions may be applied daily after soaking and gentle debridement; treatment typically requires several weeks of consistent use. Professional in-office debridement by a podiatrist—using sterile instruments to carefully pare down the hyperkeratotic tissue—is safe, effective, and often provides immediate symptomatic relief. In recalcitrant or recurrent cases, especially those associated with underlying structural deformities (e.g., hammertoe, bunions, or metatarsal misalignment), custom orthotics or surgical correction of the deformity may be warranted.

It is critical to distinguish corns from plantar warts (caused by human papillomavirus), which may appear similar but demonstrate characteristic features such as interruption of dermatoglyphics, pinpoint bleeding upon paring, and lack of pain with direct pressure (but tenderness with lateral squeeze). Misdiagnosis can lead to inappropriate treatment and delayed resolution. Patients with diabetes, peripheral neuropathy, or compromised circulation should never attempt self-treatment and must seek evaluation by a qualified foot specialist to prevent ulceration or infection.