Grading & Level of Importance: B
阴虱
由阴虱叮咬引起的瘙痒性皮损的皮肤病，发生于会阴、肛周和腋窝部位。
阴虱：长1.3-1.6毫米，无宿主的情况下，在室温下只能存活两天。通过人与人密切接触传播，尤其是性接触传播。
发生于会阴或者其他有毛部位的瘙痒。特异性表现（但不常见）：石板灰至蓝灰色的斑疹（蓝紫斑），由叮咬部位的含铁血黄素分解产物形成。虱卵附着于毛干，成年虱具有活动性。
有毛区，尤其是阴毛区和肛周区，也可以是腋下、胸部、腹部、股部和胡须区。儿童好发于睫毛和眉毛，少见于头皮。
化脓感染。
依据临床特点（蓝紫斑）和明确虱卵和虱的存在。
一般治疗：和头虱相同。并且性伙伴需要治疗。
马拉硫磷洗发水, 林丹凝胶或洗剂（丙体-666）。
牢记10天后重复治疗。
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