疣是由乳头瘤病毒所引起的皮肤新生物。掌疣是发生于手掌的寻常疣 ,趾疣是发生于足底的寻常疣。掌、趾疣初起为一细小发亮的丘疹 ,后逐渐增大 ,表面角化、粗糙不平 ,呈灰褐、灰黄、污灰色 ,为圆形 ,境界清楚 ,周围绕以稍高增厚的角质环 ,削去表面角化层 ,可见乳白色角质软芯及 Warts are skin neoplasms caused by papilloma virus. Palm warts occur in the palms of the common warts, toe warts is the common warts occurred in the plantar. Palm, toe warts from the beginning of a small bright shiny papules, after gradually increased, keratosis, rough, gray-brown, gray, dirt gray, round, clear, surrounded by a slightly thickening of the horny Ring, cut the surface keratinized layer, visible milky keratin soft core and