Warts (verrucae) are caused by a virus called the human papillomavirus (1). The numerous strains of papillomaviruses that cause the common wart are transferred by physical contact and enter the skin at... (read more)
The formation of callus is a protective mechanism used by the skin to respond to external mechanical irritation. All skin is capable of forming callus. The most common locations for callus on the foot... (read more)
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