腿上出现褐色斑块

来自杨尧医生的专业解答，快打开看看是否又获得了新的知识点～

https://m.baidu.com/bd_page_type=1/t=mip/tc?ct=54&lid=30249346757101&module=mip&cst=91&clk_extra=%7B%22pageid%22%3A%2230249346757101%22%2C%22searchID%22%3A%2230249346757101%22%2C%22nPageID%22%3A%2230249346757101%22%2C%22mip_logid%22%3A%2230249346757101%22%2C%22masterpage_type%22%3A%22self%22%2C%22originalUrl%22%3A%22https%3A%5C%2F%5C%2Fm.jkzl.com%5C%2Fdoctor%5C%2Fmip%5C%2Fmip_question.html%3FquestionId%3D4854577%22%2C%22srcid%22%3A%22landingpage%22%2C%22name%22%3A%22A%5Cu533a%5Cu6b63%5Cu6587%5Cu6298%5Cu53e0%22%2C%22id%22%3A%22expand_content%22%7D&tcreq4log=1

https://m.baidu.com/bd_page_type=1/t=mip/tc?ct=54&lid=30249346757101&module=mip&cst=112&clk_extra=%7B%22pageid%22%3A%2230249346757101%22%2C%22searchID%22%3A%2230249346757101%22%2C%22nPageID%22%3A%2230249346757101%22%2C%22mip_logid%22%3A%2230249346757101%22%2C%22masterpage_type%22%3A%22self%22%2C%22originalUrl%22%3A%22https%3A%5C%2F%5C%2Fm.jkzl.com%5C%2Fdoctor%5C%2Fmip%5C%2Fmip_question.html%3FquestionId%3D4854577%22%2C%22srcid%22%3A%22landingpage%22%2C%22name%22%3A%22A%5Cu533a%5Cu6b63%5Cu6587%5Cu4e0b%5Cu65b9%5Cu4e2d%5Cu95f4%5Cu5c55%5Cu5f00%5Cu6309%5Cu94ae%22%2C%22id%22%3A%22new_expand_content%22%7D&tcreq4log=1

健康之路

病情分析：腿上出现褐色斑块可能是以下几种原因：1、脂溢性角化病，它的发病原因并未明确，通常认为与年龄的增长以及紫外线照射，或者是人乳头瘤病毒感染有关。2、扁平疣，是因人乳头瘤病毒感染皮肤小伤口或破损口而形成的，小的丘疹可以融合成褐色的斑块。

杨尧

副主任医师

提示：本内容仅作参考，不能代替面诊，如有不适请尽快线下就医

问题描述：我老爸今年50岁，腿上出现了褐色的斑块，我想咨询一下这是什么原因引起的？