Corns, Calluses, and Plantar Warts: Causes and Key Differences As a podiatrist, I often encounter patients presenting with localized thickened skin on their feet, commonly mistaking corns, calluses, and plantar warts for one another. While these conditions may appear similar, they have distinct causes, characteristics, and treatment approaches. A clear understanding of their differences is essential for accurate diagnosis and effective management. 1. Pathogenesis of Corns (Heloma) Corns develop as a result of chronic pressure and friction, typically over bony prominences such as the dorsal aspects of the toes or the plantar forefoot. The skin thickens in response to repeated mechanical stress, forming a localized, hyperkeratotic lesion with a central, dense core that can exert pressure on underlying soft tissues, leading to pain and discomfort. There are two primary classifications: Hard corns (Heloma durum): Typically found on [...]