Pityriasis alba - 白糠疹
relevance score : -100.0%
ReferencesPityriasis alba 是一種常見且無害的皮膚病，主要影響兒童和青少年。它通常被視為異位性皮膚炎的一小部分，且與大多數人的過敏體質相關。Pityriasis alba 在皮膚上表現為淺色斑塊，形狀多為圓形或橢圓形，偶有輕微鱗屑與癢感。這些斑塊常出現在臉部，尤其是臉頰，亦可見於手臂和上半身，在膚色較深者身上更為明顯。早期斑塊可能呈淡紅色，隨時間顏色會逐漸變淡。陽光曝曬會使斑塊更顯眼，易讓患者或家長擔憂，但 Pityriasis alba 多數會自行消退，皮膚恢復正常色澤。雖然大多數病例在一年內自行改善，亦有可能需要數個月甚至數年。治療上通常使用溫和的乳霜或乳液，並向患者或家長說明情況並非嚴重。
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.
在初級保健中，常見色素沉澱問題，包括 post-inflammatory hyperpigmentation（發炎後色素沉著）、melasma（黃褐斑）、sun spots（曬斑）、freckles（雀斑）以及 café au lait spots（咖啡牛奶斑）。
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.
此病通常不需要治療，病灶會隨時間自然消退。若需加速改善，可於一至兩週內短期使用類固醇乳膏。
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