硬下疳即一期梅毒，是性传播疾病之一。由梅毒螺旋体于入侵部位引起的炎症反应。初起为一小红斑或丘疹，后为硬结，很快糜烂或溃疡，为圆形或椭圆形，直径１～２ｃｍ，边界清楚，周围提状隆起，绕以红晕，基底肉红色，少许渗出物，多为单个，无痛，扪之呈软骨样硬度。男性... Under the scab is a syphilis, is one of sexually transmitted diseases. Inflammation caused by Treponema pallidum at the invasion site. Beginning for a small erythema or papules, after the induration, erosion or ulcers, circular or oval, diameter 1 ~ 2cm, clear boundary around the raised ridge, around the flush, the base of red meat, a little exudation Material, mostly single, painless, palpable cartilage-like hardness. male...