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Abstract：
BACKGROUND: Norwegian scabies (NS) is a serious parasitic skin condition. Although NS is one of the causes of erythroderma, it is frequently overlooked. Therefore, it is essential to raise awareness regarding NS presenting as erythroderma.
METHODS: We present a case of NS that persisted for more than 3 years. After following nonstandard treatment, the patient\'s rash worsened and gradually progressed into erythroderma. Finally, NS was diagnosed by skin microscopy and pathology.
CONCLUSIONS: When patients with pruritic dermatosis have high-risk factors such as prolonged bed rest and immunodeficiency, clinicians need to enhance their awareness of NS and ensure prompt diagnosis and treatment.
METHODS: We present a case of NS that persisted for more than 3 years. After following nonstandard treatment, the patient\'s rash worsened and gradually progressed into erythroderma. Finally, NS was diagnosed by skin microscopy and pathology.
CONCLUSIONS: When patients with pruritic dermatosis have high-risk factors such as prolonged bed rest and immunodeficiency, clinicians need to enhance their awareness of NS and ensure prompt diagnosis and treatment.
摘要：
背景：挪威sc疮（NS）是一种严重的寄生虫性皮肤病。尽管NS是红皮病的原因之一，它经常被忽视。因此,提高对NS表现为红皮病的认识至关重要。
方法：我们介绍了一例持续3年以上的NS病例。经过非标准治疗后，患者的皮疹恶化并逐渐发展为红皮病。最后,经皮肤镜检和病理确诊为NS。
结论：当瘙痒性皮肤病患者存在长期卧床和免疫缺陷等高危因素时，临床医生需要提高对NS的认识，并确保及时诊断和治疗。
方法：我们介绍了一例持续3年以上的NS病例。经过非标准治疗后，患者的皮疹恶化并逐渐发展为红皮病。最后,经皮肤镜检和病理确诊为NS。
结论：当瘙痒性皮肤病患者存在长期卧床和免疫缺陷等高危因素时，临床医生需要提高对NS的认识，并确保及时诊断和治疗。
