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Circular, tiny, often unilateral scales on plantar skin are diagnostic for "dry-type tinea", probably resulting from genetically determined predisposition to this silent dermatophyte (T. rubrum) infection. Plantar tinea is more common than believed. The next step is onychomycosis, which brings the patient to seek help. It is beneficial to recognize the infection already on the skin and save the patient from longer therapy of nail infection. Oral fungicidal therapy is preferred to guarantee long-term cure.