Psoriasis  (银屑病)

银屑病是一种慢性、非传染性自身免疫性皮肤病，其特征是红色鳞状斑块，伴有瘙痒或疼痛，常累及肘部、膝盖、头皮和面部。银屑病是由免疫介导的皮肤细胞增殖加速导致异常堆积所致。该病与其他皮肤病的症状相似，诊断较为困难。感染、压力、皮肤干燥和特定药物等因素均可诱发银屑病发作。治疗方法包括外用药膏、全身用药和光疗。部分银屑病患者会发展为银屑病关节炎，影响关节和指甲。由于银屑病具有很强的遗传易感性，重症病例可能导致严重的身体、功能和社会心理障碍。

Psoriasis is a chronic, non-contagious autoimmune skin disorder marked by red, scaly patches that may be itchy or painful, commonly affecting the elbows, knees, scalp, and face. It results from an immune-mediated acceleration of skin cell production, leading to abnormal buildup. The condition can mimic other dermatological diseases, making diagnosis challenging. Flare-ups are triggered by factors such as infections, stress, dry skin, and specific medications. Treatment options include topical creams, systemic medications, and phototherapy. In some individuals, psoriasis progresses to psoriatic arthritis, impacting joints and nails. With a strong genetic predisposition, severe cases can lead to substantial physical, functional, and psychosocial impairment.

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