患者,女,25岁,未婚。因头腰及腹部斑丘疹,伴瘙痒3个月,加重2天来诊。体检:系统检查无异常,双侧腹股沟淋巴结肿大,无压痛,头部见密集成群分布的丘疹互相融合,形成大片损害,形成大片损害,在发际边缘为卫星状分布略高出皮面之斑丘疹,表面覆盖层干燥的银白色鳞屑。腰部、腹部可见暗红花朵样丘疹,大小不等,直径从0.5～2cm,无破溃及渗出,皮损 Patient, female, 25 years old, unmarried. Due to head and lumbar rash, with itching 3 months, increased 2 days to clinic. Physical examination: no abnormalities in the system examination, bilateral inguinal lymph nodes, no tenderness, dense crowds of papules seen on the head are merged with each other to form large lesions and large lesions, which are distributed slightly above the edge of the hairline as satellite Rash rash, the surface covered with dry silver-white scales. Waist, belly visible dark red flower-like papules, ranging in size, diameter from 0.5 ~ 2cm, no ulceration and exudation, lesions