胳膊上长了一块红癣，不疼不痒。

来自杨榕青医生的专业解答，快打开看看是否又获得了新的知识点～

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快速问医生

病情分析：你这个需要有个图片参考一下，除外真菌感染引起的癣病，也需要除外过敏引起的，可以去医院皮肤科查个真菌免疫荧光检查以明确诊断，必要时可以买个曲安奈德益康唑乳膏外用治疗

杨榕青

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：前几天洗澡的时候发现的，胳膊上长了一块红癣，不痛不痒，目前没有扩大的迹象。