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，並且與大多數人的過敏有關。Pityriasis alba 在皮膚上表現為淺色斑塊，通常呈圓形或橢圓形，有時伴隨少量鱗屑與輕微搔癢。這些斑塊常出現在臉部，尤其是臉頰，以及手臂和上半身，膚色較深者更為明顯。起初斑塊可能略帶紅色，但隨時間推移顏色會逐漸變淡。陽光曝曬會使斑塊更為顯眼，可能讓患者或家長感到擔憂；然而 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改善，但也可能需要數個月甚至數年。治療通常以溫和的乳霜或乳液為主，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.
此病通常不需要特別治療，病灶會隨時間自行消退。若需加速恢復，可於一至兩週內短期使用類固醇乳膏。
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