What is a verruca?

A verruca, commonly known as a wart, is a growth on the skin caused by a viral infection, specifically by human papillomavirus (HPV). The term "hypertrophy of the papillae" refers to the overgrowth or enlargement of the papillary dermal tissue, which occurs as a response to the viral infection. This leads to the characteristic raised, rough surfaces of warts.

The presence of the virus stimulates the affected skin cells to multiply uncontrollably, causing the visible growth. Verrucas can appear on various parts of the body and can differ in size and appearance based on the location and the individual’s immune response. Understanding the viral nature of a verruca is essential for both treatment and prevention strategies in the field of esthetics and skincare.