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白癣又称“蛀毛癣”、白秃疮、小孢子菌头癣，最常见。病原菌主要是铁锈色小孢子菌及犬小孢子菌，偶见石膏样小孢子菌。初起皮疹为群集的毛囊性红丘疹，以后发展成灰白色鳞屑性斑片，病发在离头皮上约0.3～0.8cm处折断，略稀疏，无光泽；在残留的毛根上有灰白色套状鳞屑包绕，即“菌鞘”，乃是真菌孢子寄生在发干上所致；一般无炎性反应，亦可轻微发红，毛囊可突起如鸡皮状，偶可伴发脓疱，渗液，结痂，附近淋巴结肿大，自觉痒感，皮疹一般发展至半年后不再扩大增多，处于相对静止状态，至青春期趋向自愈，若无继发感染，不留瘢痕，愈合后头发可完全生长。
白癣好发于儿童；轻度瘙痒；病发干燥、失去光泽、容易折断；皮疹一般发展至半年后停止，历时数年，青春期后可自愈；愈后不留疤痕，不影响头发生长。
早期皮疹为红色毛囊性小丘疹；以后发展成灰白色鳞屑性斑片；病发多在距头皮0.3～0.8cm处折断；残根松动易拔，周围绕以白色菌鞘；皮疹呈卫星状分布。
伍德氏灯检查显示皮疹呈亮绿色荧光；取病发或皮屑直接真菌镜检，可见断发外鞘由无数圆形孢子组成，有时可见发内菌丝；选断发接种在沙氏培养基上，室温培养1~3周，有真菌菌落生长；菌种鉴定主要为铁锈色小孢子菌及犬小孢子菌。
白癣的治疗原则是力求早发现，早治疗；做到规则治疗，直至痊愈；可行系统治疗、人工拔发、局部用药相结合，增强疗效。
系统治疗可选用伊曲康唑或特比萘芬，疗程1~2个月。
局部用药首选云江皮灵霜；也可选用2.0%~5.0%碘酊、5%~10%硫黄软膏、复方苯甲酸软膏，10%水杨酸软膏；1%~3%克霉唑软膏，2%达克宁霜、联苯苄唑软膏、特比萘芬软膏、萘替芬软膏及氯柳酊等外涂患处，每日2次。
病发可用镊子逐根拔除，每周一次，连续3次。
中医认为，白癣系外感毒邪、湿热内蕴、肌肤失养，以致发焦脱落。以清热解毒祛湿为治则；经方选用苦参汤加减。
在预防方面，要普及头癣的防治的基本知识；积极治疗白癣患者，并做好隔离工作，白癣未治愈前不能上学、入托、入幼及游泳；不共用头梳、帽子及枕套等生活用品；理发用具要清洁消毒；患病宠物要及时治疗。
得了白癣搞不定者，可到何成雄主任医师处就诊。
就诊白癜风可以治愈么北京治疗白癜风到哪里好
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