Etiology of psoriasis (neurodermatitis)

The papules gradually expand and merge into patches or plaques with thick silver scales on the surface. The patches or plaques are of irregular shape, some take the shapes of map or island, yet some are smaller but more, with the appearance of starry sky and with the scales shedding off layer after layer.

Xiaodian plaster (for external application) is the effective drug for treating vitiligo.


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