Verruca Plana. Verruca plana, also called flat warts, are small pink or brown bumps which appear on the face or legs and are caused by the human papilloma virus (HPV). The growths develop on the outer layer of the skin and although they are harmless, HPV itself is highly contagious. In some cases, the warts may disappear on their own within a year. Otherwise, they can be removed by being frozen or burned off or by using chemicals or lasers. They are usually more common in children and teens than adults.
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