Pityriasis alba - 白糠疹
relevance score : -100.0%
ReferencesPityriasis alba 是一种常见且良性的皮肤病，主要影响儿童和青少年。它通常被视为特应性皮炎的一小部分，并且与多数人的过敏体质有关。Pityriasis alba 在皮肤上表现为浅色斑块，常呈圆形或椭圆形，偶有轻度鳞屑和瘙痒。这些斑块多见于面部，尤其是脸颊，以及手臂和上半身，在肤色较深者中更为明显。早期斑块可能略呈红色，随时间推移颜色逐渐变浅。阳光照射会使斑块更加明显，可能引起患者或家长的担忧，但 Pityriasis alba 通常可自行消退，皮肤恢复正常色素。大多数病例在一年内自行好转，亦有少数需数月乃至数年才能完全恢复。治疗一般采用温和的乳膏或乳液，并向患者或家长说明病情并不严重。
Pityriasis alba is a prevalent and benign dermatological condition predominantly affecting children and adolescents. The name pityriasis alba derives from its appearance, where pityriasis denotes the fine scales and alba signifies the pale color (hyperpigmentation). This skin disorder is often considered a minor manifestation of atopic dermatitis and is typically associated with a history of atopy in most individuals. Pityriasis alba is characterized by ill-defined macules and patches (or thin plaques), generally circular or oval, often with mild scaling and occasional pruritus (Macules or Patches Observed in Pityriasis Alba). The lesions are usually found on the face, especially the cheeks, arms, and upper trunk, and are more prominent in individuals with darker skin types. Initially, the lesions may exhibit mild erythema and gradually transition to a hypopigmented state over time. Sun exposure can accentuate the appearance of these lesions, which may often raise concerns regarding their cosmetic impact on patients or parents of children. However, pityriasis alba follows a spontaneous, self-resolving course, gradually restoring normal skin pigmentation. The resolution period for pityriasis alba varies from several months to a few years, although most cases typically resolve within 1 year. Treatment for this condition involves reassurance, low-potency topical corticosteroids, and mild emollients as the mainstay.
Pityriasis alba is a prevalent and benign dermatological condition predominantly affecting children and adolescents. The name pityriasis alba derives from its appearance, where pityriasis denotes the fine scales and alba signifies the pale color (hyperpigmentation). This skin disorder is often considered a minor manifestation of atopic dermatitis and is typically associated with a history of atopy in most individuals. Pityriasis alba is characterized by ill-defined macules and patches (or thin plaques), generally circular or oval, often with mild scaling and occasional pruritus (Macules or Patches Observed in Pityriasis Alba). The lesions are usually found on the face, especially the cheeks, arms, and upper trunk, and are more prominent in individuals with darker skin types. Initially, the lesions may exhibit mild erythema and gradually transition to a hypopigmented state over time. Sun exposure can accentuate the appearance of these lesions, which may often raise concerns regarding their cosmetic impact on patients or parents of children. However, pityriasis alba follows a spontaneous, self-resolving course, gradually restoring normal skin pigmentation. The resolution period for pityriasis alba varies from several months to a few years, although most cases typically resolve within 1 year. Treatment for this condition involves reassurance, low-potency topical corticosteroids, and mild emollients as the mainstay.
在初级保健中，常见色素沉着问题，包括 post-inflammatory hyperpigmentation（炎后色素沉着）、melasma（黄褐斑）、sun spots（日晒斑）、freckles（雀斑）和 café au lait spots（咖啡斑）。
In primary care, pigmentation problems are often found. These include post-inflammatory hyperpigmentation, melasma, sun spots, freckles, café au lait spots.
In primary care, pigmentation problems are often found. These include post-inflammatory hyperpigmentation, melasma, sun spots, freckles, café au lait spots.
该病一般不需要特殊治疗，病变会随时间自行消退。如需短期缓解，可使用类固醇乳膏 1‑2 周。
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