Classification and Characteristics of Warts
Warts are benign epidermal neoplasm caused by human papilloma virus or HPV, which can selectively infect skin or mucosal epithelium. Warts are clinically divided into four types, namely common warts, flat warts, plantar warts and genital warts.
Common warts are also known as “thorn wart” or ”verruca vulgaris”, occurring on adolescents hand and foot back, fingers, toes, etc. Common warts are circular keratotic papules with the size of needle to soybean. They have rough surface and are slightly hard. The debut lesions usually have large size, known as ”mother wart”, while lesions around the mother wart are smaller with a satellite appearance.
Common warts occurring around the nail are called ”periungual warts”, and warts occurring in the nail bed are called subungual warts, where nails can be jacked up and become distorted. Common warts with elongated protrusions and hyperkeratotic top are called ”filiform warts”, which usually occur in the neck and eyelids. Common warts with uneven finger-like projections on the surface are called ”finger warts”, which usually occur in the scalp and between the toes.
Common warts can bleed easily after impact or friction. Lesions may be unhealed a few years, but most lesions can fade away spontaneously within 2 years. In addition to the impediment of activities in friction parts and tenderness, common warts have no other symptoms. If sufferers get sudden itching and lesions at the bottom become red and swelling, warts may gradually subside.