Pityriasis alba - 白糠疹
References
Pityriasis alba 是一种常见且无害的皮肤病，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，并且与大多数人的过敏有关。 Pityriasis alba 在皮肤上表现为浅色斑块，通常呈圆形或椭圆形，有时伴有一点鳞屑和瘙痒。这些斑块通常出现在面部，尤其是脸颊，以及手臂和上半身，并且在肤色较深的人中更为明显。起初，斑块可能有点红色，但随着时间的推移，颜色会逐渐变浅。阳光照射会使它们变得更加明显，这可能会让患者或家长担心，但 pityriasis alba 通常会自行消失，恢复皮肤的正常颜色。尽管大多数案件会在一年内得到解决，但这种情况可能需要几个月到几年的时间才能发生。治疗通常包括使用温和的乳膏和乳液，并向患者或家长保证情况并不严重。
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，经常发现色素沉着问题。这些包括 post-inflammatory hyperpigmentation, melasma, sun spots, freckles, and 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.
In primary care, pigmentation problems are often found. These include post-inflammatory hyperpigmentation, melasma, sun spots, freckles, café au lait spots.
不需要治疗，病变会随着时间的推移而消退。可以尝试使用类固醇乳膏一到两周的短期时间。
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